Questions Asked onOctober 3, 2011

1. physics

A father racing his son has 1/3 the kinetic energy of the son, who has 1/3 the mass of the father. The father speeds up by 1.4 m/s and then has the same kinetic energy as the son. What are the original speeds of (a) the father and (b) the son?

2. Calculus

A ball is thrown straight down from the top of a 220-foot building with an initial velocity of -22 feet per second. What is its velocity after 3 seconds? What is its velocity after falling 108 feet?

3. math

wHY DID MISS MAFFET NEED A ROAD MAP

asked by may lou
4. statistics

Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?

5. Math

A triangle and trapezoid share a 15 inch base and a height of 10 inches. For what values of b is the area of the trapezoid less than twice the area of the triangle?

6. AP Chemistry

What mass of silver nitrate (AgNO3) is required to prepare 400 g of a 3.50% solution of AgNO3

7. Chemistry

A)What mass of carbon dioxide is produced from the complete combustion of 7.00×10−3 g of methane? B)What mass of oxygen is needed for the complete combustion of 7.00×10−3 g of methane?

8. calculus

The radius of a spherical balloon is increasing at a rate of 2 centimeters per minute. How fast is the volume changing when the radius is 8 centimeters? Note: The volume of a sphere is given by 4(pi)r^3

9. physics

a 2.00 m tall basketball player is standing on the floor 10 m from the basket. if she shoots the ball at a 40 degree angle with the horizontal at what initial speed mjust he throw the basketball so that it goes through the hoop without striking the

10. English

What is the predicate in this sentence? The wiskers on my kitten twitch when I rub its back.

11. Math

11. A rocket is fired upward from some initial height above the ground. Its height h in feet above the ground t seconds after it is fired is given by h = -16t2 + 48t +448. (i) What is its initial height? __________ ft. (ii) What is its maximum height?

12. Calculus

The annual inventory cost C for a manufacturer is C=(1,008,000/Q)+6.3Q where Q is the order size when the inventory is replenished. Find the change in annual cost when Q is increased from 350 to 351, and compare this with the instantaneous rate of change

13. physics help

in a local diner a customer slides an empty coffee cup down the counter for a refill. the cup slides off the counter and strikes the floor at a distance d from the base of the counter. if the height of the counter is h. a) find an expression for the time t

14. math

A farmer with 2000 meters of fencing wants to enclose a rectangular plot that borders on a straight highway. If the farmer does not fence the side along the highway, what is the largest area that can be enclosed?

15. Physics

A particle moves along a circular path over a horizontal xy coordinate system, at constant speed. At time t1 = 4.80 s, it is at point (4.40 m, 6.20 m) with velocity (3.70 m/s) and acceleration in the positive x direction. At time t2 = 11.0 s, it has

16. algebra

How can you divide 64 into 2 groups ti get a ratio of 3 to 5?

17. geometry

Two poles, 60 feet tall and 20 feet tall, stand on opposite sides of a field. The poles are 80 feet apart. Support cables are placed from the top of each pole to the bottom of the opposite pole. How far above the ground is the intersection of the cables.

18. pre-calculus

in Triangle abc, tanA=3/4, tan B=1, and a=10. find b in simplest radical form.

19. chemistry

A crucible containing potassium chlorate has a mass is 24.426 g. The crucible is heated according to the lab procedure for this week's experiment and is found to weigh 23.642 g. Write an equation for the reaction and, assuming that all the chlorate

20. Physics

A plane weighing 220 kN (25 tons) lands on an aircraft carrier. The plane is moving horizontally at 67 m/s (150 mi/h) when its tail hook grabs hold of the arresting cables. The cables bring the plane to a stop in a distance of 84 m. (a) How much work is

21. Math

How ca Steve add 48 + 34 by making a ten? What is the sum?

22. chemistry

The total number of atoms in 0.111 mol of FeCO3(PH3)2...?

23. physics

stephanie serves a volleyball from a height of .8m and gives it an initial velocity of 7.6m/s straight up. how high will it go? how long will it take to reach maximum height?

24. physics

A 747 jetliner lands and begins to slow to a stop as it moves along the runway. The mass is 3.1 105 kg, its speed is 25.5 m/s, and the net braking force is 4.24 105 N.(a) What is its speed 7.45 s later?How far has it traveled in this time?

25. pre-calculus

How do I prove that sinx/sinx+cosx=tanx/1+tanx

26. math

lopez spent 1/3 of his vacation money for travel and 2/5 of his vacation money for lodging. He spent \$1100 for travel and lodging. What is the total amount of money he spent on his vacation?

27. Angular Acceleration

A child pushes a merry go-round from rest to a final angular speed of 0.4 rev/s with constant angular acceleration. In doing so, the child pushes the merry-go-round 1.1 revolutions. What is the angular acceleration of the merry go-round? I got .0727 but

28. geometry

Angles BAC and Angle CAD are supplementary angles. Find the measures of each angle if the measure of Angle BAC is 10x + 16 and the measure of Angle CAD is 7x + 8. Round angle measures to the nearest tenth

29. geography

What capital city is near the equator and 80 degrees W of longitude? My answer is --- Lima, Peru. Am I right?

30. physics

Charge of uniform surface density (0.2 nC/m2) is distributed over the entire xy plane. Determine the magnitude of the electric field at any point having z = 2 m.

31. geometry

Suppose points A, B, and C have the coordinates given below. Find y such that C is on the perpendicular bisector of segment AB. A(−1, 4), B(7, −2), C(9, y)

32. Physics

An electron, starting from rest and moving with a constant acceleration, travels 5.5 cm in 10 ms. What is the magnitude of this acceleration? Answer in units of km/s

33. MATH

a box contains 20 slips of papers, numbered 1-20. A slip of paper is drawn from the box and the number is noted. Find the probability that it is a positive integer less than 21.

34. physics

A golfer wants to drive a ball a distance of 310 yards. If the 4-­‐wood launches the ball at an angle at 15° above the horizontal, and assuming that the drive is over level ground (i.e. the start and final vertical position is the same; vertical

35. CHEM 102

A particular household ammonia solution (d=0.97 g/mL) is 6.8% NH3 by mass. How many mililiters of this solution should be diluted with water to produce 625mL of a solution with pH = 11.65.

36. CHEM 102

What is the pH of a solution that is 0.62M H2SO4(aq) and 1.7M HCOOH (formic acid).

37. Chemistry

The Vitamin C content claimed on the product label is that 1 cup of juice contains 130% of the recommended daily allowance (RDA) for vitamin C? Based on the product label claimed, how many milliliters of this juice must an adult drink to obtain the

38. Psychology

In Pavlov's classical conditioning experiments, the neutral stimulus that comes to elicit a conditioned reponse is known as the: A) unconditioned stimulus B) conditioned stimulus C) reinforced stimulus D) unreinforced stimulus I believe the answer is A or

39. chemistry

CH4 + 2O2 = CO2 + 2H2O Starting with 13.6 g of CH4, calculate the mass in grams of CO2 produced if there is enough O2 gas to react with all of the CH4

40. Physics

Tarzan, who weighs 917 N, swings from a vine through the jungle. How much work is done by the tension in the vine as he drops through a vertical distance of 3.85 m? Simply calculating; W=(917N)*(3.85m)= 3530.45 J Isn't working, I'm not sure how to apply

41. science

Charge of uniform surface density (0.2 nC/m2) is distributed over the entire xy plane. Determine the magnitude of the electric field at any point having z = 2 m.

42. math

Anthony plans to ride 175 km on his bike and Samanta plans to ride 250km. They both plan to complete their journeys in a whole number of days. How many kilometres could each person travel if they both ride the same number of kilometres each day. How many

43. Check please science

Cells are to tissues as organs are to 1 ORGAN SYSTEM 2 CELLS 3 GENES 4 ORGANELLES IS THE ANSWER 1 ORGAN SYSTEM Which of statements about cells is not true? 1. One or more cells make up all living organisms 2 cells carry on the basic life functions of

44. Chemistry

Calculate the grams of KHP needed to react with 25.2 ml of 0.10M KOH if the reaction is? KOH+KHP -----> K2P + H2O

45. economics

An increase in personal income tax rates will cause a(n)

46. math

if a set of six books is placed randomly on a shelf, what is the probability that they will be arranged in either correct or reverse order?

47. chemistry

predict the outcome of mixing aqueous solutions of the following reactions. write the ionic equations of each. mercury (ll) nitrate + ammonium iodide manganese (ll) chloride + sodium sulfide lead (ll) nitrate + sodium sulfate barium nitrate + lithium

48. Physics: Three Identical Masses

Three identical masses of 640 each are placed on the x axis. One mass is at = -100 , one is at the origin, and one is at = 400 . What is the magnitude of the net gravitational force on the mass at the origin due to the other two masses? Take the

49. Physics

The two cubes in the drawing are made from the same material. The radiant energy per second emitted by the small cube is 3.70 J/s. What is the energy emitted per second by the larger one?

50. geometry

The bases of a trapezoid are 38 and 17 respectively. The angles at the extremities of the larger base are 57 degrees and 45 degrees. find the two legs.

51. Math

To add 32 + 56, Juanita first added 30 + 50. What steps does she still need to do to find the sum? What is Juanita's sum?

52. physics

Two gears A and B are in contact. The radius of gear A is twice that of gear B. (a) when A’s angular velocity 6.00 Hz counter clockwise, what is B’s angular velocity? (b) If A’s radius to the tip of the teeth is 10.0 cm what is the linear speed of a

53. Chemistry

Write a balanced molecular equation for aqueous nitric acid and aqueous ammonia. Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

54. Chemistry

Your bedroom is 18 ft long and 15 ft wide, and the distance from floor to ceiling is 8 ft 6 in. You need to know the volume of the room in metric units for some scientific calculations. (a). What is the room’s volume in cubic meters? (b). What is the

55. math stats

you draw from a deck. if you get a red card you win nothing. if you get a spade you win \$5. for any club you win \$10 plus an extra \$20 for the ace of clubs. A. create a probability model for the amount you win. B. Find the expected amount you will win. C.

56. To Sam: Penn Foster answers

Please do not post any more answers. Jiskha is not a repository for any exam answers. In addition, we have no idea what the questions are. If you want to post a couple of your exam questions along with your answers, we'll be glad to check them for you.

asked by Ms. Sue
57. chemistry

How many grams of PbCO3 will dissolve when exactly 5.0 L of 1.25 M H is added to 6.0 g of PbCO3? When the equation is PbCO3(s) + 2H(+)(aq) = Pb(2+)(aq) + H2O(l) + CO2(g)

58. algebra

The horsepower (hp) that a shaft can safety transmit varies jointly with its speed (in revolutions per minute, or rpm) and the cube of the diameter. If a shaft of a certain material 2 in in diameter can transmit 36 hp at 75 rpm, what diameter must the

59. Phsics

What force must be exerted on block A in order for block b not to fall. The coefficient of static friction between block A and B is 0.55, and the horizontal surface is frictionless. A= 100kg and B=10kg A is on the horizontal surface and B is attached to A.

60. Chemistry

A solution of 114 mL of 0.160 molecules KOH is mixed with a solution of 300 mL of 0.250 molecules NiSO4. a. write a balanced equation for the reaction that occurs. identify all phases in answer

61. Physics

A car goes around a curve on a road that is banked at an angle of 32.5 . Even though the road is slick, the car will stay on the road without any friction between its tires and the road when its speed is 19.0 . What is the radius of the curve?

62. Chemistry, Need Help!!

a)How many grams of H2 are needed to produce 14.27 g of NH3? b)How many molecules (not moles) of NH3 are produced from 1.57×10−4 g of H2 ?

63. Physics

One boat tows another boat by means of a tow line, which is under a constant tension of 495 N. The boats move at a constant speed of 4.75 m/s. How much work is done by the tension in 1.10 min? Not sure how to apply the work-energy theorem. I assume

64. chemistry

Lactic acid is a weak monoprotic acid. If a 0.10 M solution of it has a pH of 2.44, what is the dissociation constant (Ka) for lactic acid. I got 1.3x10^-4? Is that right?

65. Chemistry Help please!

What mass of Na2CO3 is required to prepare 607.0 mL of 0.250 M solution? Use a molar mass with at least as many significant figures as the data given. ____g?

66. Spanish Lit (De la Educación Moral)

Ok so I'm trying to analyze the essay De la educación moral by Gabino Barreda but I'm stuck on these two paragraphs. Thus far in the essay I've found that he's trying to prove that religion itself is poitnless and irrelavent because all the rules and what

67. physics

An object moving on the x axis with a constant acceleration increases its x coordinate by 161 m in a time of 12.5 s and has a velocity of 20 m/s at the end of this time. Determine the acceleration of the object during this motion. Answer in units of m/s2.

68. Chemistry

How many moles of H3PO4 are there in 35.0 mL of 0.60 M H3PO4 solution?

69. chemistry

sodium borohydride (NaBH4) is used industrially in many organic syntheses. one way to prepare it is by reacting sodium hydride with gaseous diborone. Assuming an 86.8% yield,how many grams of NaBH4 can be prepared by reacting 7.98g of sodium hydride and

70. chemistry

a room is 18ft long, 15ft wide and from floor to ceiling is 8ft6inches. what is the rooms volume in cubic meters? i have 6.498716 is this correct? what is the mass of air in the room in kilograms assuming the density of the air is 1.2g/l and the room is

71. math

In how many ways can the letters of the word EIGHT be arranged using only four of the letters at a time?

72. Chemistry

Is C12H22O11 soluble in water and is it ionic or a acid?

73. geometry

find the value of each variable 3m+5+4m-10

74. Algebra

An open box is to be constructed from a rectangular sheet of tin 3 meters wide by cutting out a 1-meter square from each corner and folding up the sides. The volume of the box is to be 2 cubic meters. What is the length of the tin rectangle?

75. biology

what is grana?

asked by mary grace
76. chemistry

Potassium cyanide (KCN) reacts with acids to produce the poisonous hydrogen cyanide gas, HCN, according to the reaction below: KCN(aq) + HCl(aq) = HCN(g) + KCl(aq) If a sample of 0.653 g of KCN is placed in an excess of HCl, how much HCN, in grams, is

77. English

I have to analyze the use of diction and syntax in three authors specific works, but I'm unsure of how to anazlyze/explain these, exactly. I know that diction is the author's word choice and syntax is sentence structure, but I don't know how to pinpoint

78. Fibonacci Numbers

This is not a test question, but I did not know what the appropriate topic for my question is. If I used the terms 2, 3, 4, 8 consecutive terms of the Fibonacci sequence. "a" is the first and fourth terms and "b" is twice the product of the second and

79. physics

A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fall halfway to the ground is 1.4 s. Find the time it takes for the ball to fall from rest all the way to the ground.

80. IMPORTANT!!!! Psychology

For these hypothesis, I need to know... Determine what research goal is required determine whether you can use the experimental method decide how you would define your variables(using operational definitions) (1) A pregnant woman's diet affects the birth

81. Algebra 2

Solve using linear combinations. x - 5y = 6 3x + 4y = 18 What are linear combinations?

82. physics

The Earth rotates on its own axis once per day (24.0h). What is the tangential speed of the summit of Mt. Kilimanjaro (elevation 5895 m above sea level), which is located approximately on the equator, due to rotation of the Earth? The equatorial radius of

83. chemistry

How many grams of NAC2H3O2 must be dissolve in enough water to prepare 250.0 mL of a solution with a pH= 9.200? Molar mass of NaC2H3O2 ia 82.03 g/mol. Ka for C2H3O2H is 1.8x10^-5

84. math

construct-angle-f-so-that-m-angle-f-equals-2-m-angle-c

85. Science

In an experiment, Tom dissolved 2.125 g of NaOH to make 200.0 mL of aqeous solution. What is the NaOH molarity?

86. social studies

Which of the following ways of measuring explicit memory usually produces the best results? A)Relearning B) Recall C)Recognition D) Referral I chose B. Am I right?

87. biology

Hi there! I have this question for my bio/genetics homework, and I can't seem to figure it out. It reads, "A true-breeding red snapdragon is crossed to a true-breeding white snapdragon. The F1 progeny are all red. When the F1 is selfed, the following F2

88. Computer Science / Ehtics in Information Technolog

Consider a scenario. Morgan has developed a software tool and given it free of charge to Shelly for review. The tool is fully functional, and Shelly sells it to other people for money. What are the ethical issues involved in this scenario and how should

89. Chemistry II

A storage tank containing 1.6x10^4 Liters of water is found to be contaminated with nitric acid and therefore has a pH of 3.78. Calculate the volume of 0.050 M sodium hydroxide required to be added to the tank in order to neutralize (pH = 7.0) the

90. math

convert 15% into a fraction

91. physics

An automobile starts from rest and accelerates to a final velocity in two stages along a straight road. Each stage occupies the same amount of time. In stage 1, the magnitude of the car's acceleration is 2.03 m/s2. The magnitude of the car's velocity at

92. math

Ashton broke apart a number into 30 + 7. What number did he start with?

93. Math

Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?

94. Early Childhood Education

Which of these is a form of unintentional socialization a)requesting that children say please and thank you b)calculating the answer to a homework problem for a child with a learning disability c)teaching children to used a computer d)being kind to a slow

95. statistics

According to the National Transportation Safety Board, 10% of all major automobile crashes result in serious injury to at least one person involved in the crash. The Georgia Department of Transportation reports that there are approximately 20 major

96. History

In the development of the Roman Empire, the Romans treated citizenship as A. something to be shared with conquered people. B. belonging only to native Romans. C. a benefit worthy only of peoples who had freely joined them. D. meaningless because the Roman

asked by katelynn(pennfoster student)
97. geometry

Find the radius if the length of an arc is 23.56 and the angle is 135 degrees.

98. chemistry

There is a ball with a mass of 1000 lbs. It's turned into wire with a diameter of 3.12 x 10^-1 How long is the wire? This is my crazy chemistry teacher's idea of a test...and I don't even think there's a solution. HELP ME

99. chemistry

Calculate the molarity of each ion in 0.300 M Na2SO4. Enter a zero for an ion that doesn't occur in the compound. ______ M Na1+ ______ 2 M S2- ______ 3 M O 2- ______ M SO42-

100. physics

A ship leaves the island of Guam and sails a distance 295 at an angle 35.0 north of west. How far must it sail so that its resultant displacement will be 100 directly east of Guam?

101. Physics

A football is punted up into the air and it lands 5 seconds later. How high did the did the football reach it's highest point and when does it reach this height?

102. world history

(This homework question was removed due to a copyright claim submitted by K12 Inc.)

103. physics

A rocket is launched straight up with a constant acceleration. Three seconds after lift off, a small part of the rocket falls off the side. The small part hits the ground 7 seconds later. Ignoring air resistance, what was the acceleration of the rocket?

104. Chemistry

Calculate the concentration, in molarity, of a solution prepared by adding 9 mL of water to 1 mL of 0.1 M HCl solution. If 2.0 mL of 0.010 M NaOH is mixed with enough water to make the total volume 8 mL, what is the molarity of the resulting solution?

105. Physics

What force must be exerted on block A in order for block b not to fall. The coefficient of static friction between block A and B is 0.55, and the horizontal surface is frictionless. A= 100kg and B=10kg A is on the horizontal surface and B is attached to A.

106. american history

. The Niagara Movement, headed by _______, sought equal rights for blacks. * A. William Lloyd Garrison B. Booker T. Washington C. W. E. B. Du Bois D. William E. Walling

107. physics

A model rocket is launched straight upward with an initial speed of 45.4 m/s. It accelerates with a constant upward acceleration of 2.98 m/s 2 until its engines stop at an altitude of 150 m. What is the maximum height reached by the rocket? The

108. Pre-Calculus

Can you show me how to find the rectangular equation: r=2cos(theta) + 3 sin (theta) All I need is an example to work off I was absent today from Pre-Calc and I have homework to do and no explanation with them-Please help with this one Thank you

109. Calculus

show lim x->3 (sqrt(x)) = (sqrt(c)) hint: 0< |sqrt(x)-sqrt(c)|= (|x-c|)/(sqrt(x)+sqrt(c))

110. Importrant

ii.) I’ve missed more than 9000 shots in my career. I’ve lost almost 300 games. 26 times, I’ve been trusted to take the game winning shot and missed. I’ve failed over and over and over again in my life. And that is why I succeed.” –

can you help to correct my answer and english grammar. thank you so much. question below: 1. How does money is importance in our society right now? answer: The importance of money in our society right is more than anything else because everything is needed

112. English

I rewrote the procedures passengers go through when travelling by air. I sometimes doubt whether it is better to use the imperative or the you-form. Can you please help me check them? 1) Enter the airport and check your flight number and the boarding time

113. geometry

△ABC ; Ray CE bisects exterior angle BCD ; Ray CD||Line AB

114. world geography

Can you give me a link with an excellent map to find the answer to these questions? What oceans border Australia? And What continent is south of the four major oceans of the world? Thank You!!

115. Psychology

Which of the following statements describes the relationship between genes, chromosomes, and DNA? a. Genes, the basic unit of heredity, are located on chromosomes, which consist of strands of DNA b. Genes are composed of and DNA c. Chromosomes, the basic

116. statistics

what is the probability of randomly selecting a student who exercises between 55 and 80 minutes per week?

117. Calculus

is there a number a such that the lim x->2 6x^2+ax+a+57/x^+x-6 exists? if so find the value of a and the limit.

118. math

Find the sum using mental math 24 + 71 =

119. math

Which statement describes the similarity between sketches and drawings? A Both sketches and drawings are made freehand. B Both sketches and drawings do not require a compass C: Both sketches and drawings do not need drawing tools like a pencil. D. Both

asked by Help Me
120. calculus

ind an equation of the tangent line to the curve at the given point. y = sin 6x + sin2 6x, (0, 0)

121. science

a truck is travelling along a straight road at 72 km/hr.The driver saw a woman crossing and immediately steps on the brake.If the truck stops in 7 sec.what is its acceleration

122. Psychology

Studies that have overcome methodological problems in examining intelligence scores for African- americans as compared to people of Anlo-Saxon descent revealed: a. that the test results were useless becxause racial prejudice invalidated them b. thst

123. Calculus

Determine the point(s) (if any) at which the graph of the function has a horizontal tangent line for y=(3^1/2)x+2cos(x), 0¡Üx

124. simple interest

find the simple interest. Assume a 360-day year and a 30-day month. 18000 at 5%; loan made on September 12 and due November 27.

125. physics

1) Two people sit on a park bench 6.0 ft long, weighing 160 lb. A boy weighing 75lb sits directly over the legs on the left side. A man weighing 170 lb sits 2.0 ft to the right of the boy. How much weight is supported by each leg on the right side

126. Chemistry

How do we know that the moles of ascorbic acid originally present in the juice is equal to the moles of I2 that we added when the color change occurred?

128. college prep english

Ok so long story short I need help with homework......I have 3 questions on genre and its 2 genre's how do I know which one to write about ?

129. Math

How do you write a number that has a hundreds digit less than 7 , a tens digit less than 5 ,a tenths digit one more than its tens digit , a thousandths digit twice the tens digit , and other digits of your choice?

130. english

I open the door to the first room. I look for the switch, the light turns on. The walls are red in colour and the curtains are blue so thick that not a single light can peep through. how can i improve this paragraph??? please help

131. Plant

One characteristic of all living organisms is that they (1) make food (2)Live on Land (3)Maintain Homeostasis (4) move from place to place I think its 3

132. science

what is the applied voltage on a circuit in which .5 amperes current is flowing and 10 W is generated?

133. Psychology

For these hypothesis, I need to know... Determine what research goal is required determine whether you can use the experimental method decide how you would define your variables(using operational definitions) (1) A pregnant woman's diet affects the birth

134. Physics

The location of a car at times t1 and t2 is given by the position vectors r1= 15km due east + 20km due north (time t1) and r2= 13km due west + 25km due north (time t2) The units of distance are kilometers a. What is the magnitude l^rl of the displacement?

135. algebra

If sally can type a certain number of mailing labels in 6 hours and eric and sue working together can type the same number of mailing lables in 4 hours, find how long it takes eric alone to type the mailing labels.

136. Physics

What force must be exerted on block A in order for block b not to fall. The coefficient of static friction between block A and B is 0.55, and the horizontal surface is frictionless.

137. English

Is it OK to say "the plane was delayed by two hours?" Thank you for all your previous explanations. Can you say " I had my blood tested"?

138. WORLD HISTORY

(This homework question was removed due to a copyright claim submitted by K12 Inc.)

139. algebra

Find a formula that expresses the fact that P(x, y) is a distance 9 from the origin.

140. math

kathy bicycles 6 km h faster than javier. in the same time it takes javier to bicycle 33km, kathy can bicycle 45 km. how fast does each bicyclist travel?

141. Calculus

Explain how lim x->1 ((x^2)-1)/(sqrt(2x+2)-2) = 4

142. General physics

Two block are arranged at the end of a massless string. The system starts from rest. When the 4.01 kg mass fallen through 0.336m, its downward speed is 1.32 m/s. the acceleration gravity is 9.8 m/s^2. what is the frictional force between the 5.3 kg mass

asked by Jane Mitchell
143. physics

A car accelerates from rest at a constant rate of 2.2 m/s2 for 6.9 s. How far does the car travel in this time?

144. chemistry

In crystallization of sugar, the best seed slurry is obtainable by wet grinding sugar in some medium (an alcohol) like isopropyl alcohol. Why is isopropyl alcohol is used?

145. Psychology

Peter and Maria are adopting a child whose biological parents have low IQs. They want to know if this child, too, is likely to have a low IQ? Which of the following is the best response to their question? a. While IQ is heritable at least in part,

146. human srvices

human services 322 assignmnets

147. math

problem> mystery numbers: Bob is thinking of 2 numbers their sum is 26. their product is 165. what numbers is bob thinking about?

148. english

You are building a bibliography for a researched writing project in a myth and literature class. Should you use MLA style? a.Yes b.No I think B, but I am not sure.

149. Pre-Calc

Can you show me how to find the rectangular equation of r=2costheta + 3 sin theta All I need is an example to work off I was absent today from Pre-Calc and I have homework to do and no explanation with them-Please help with this one Thank you

150. physics

I am flying a plane capable of an airspeed of 100 km/hr. If the wind velocity was 45 km/h [95], in what direction would I have to fly in order to follow the track to my destination. And how long would this trip take? The distance between my starting point

151. social studies

Information in long-term memory can be organized by all of the following EXCEPT: A)semantic category. B) spelling. C) sound and form. D) familiarity and relevance. Would it be D?

152. physics

During a basketball game, a player flies above the basket and drops the ball in from a height of 10 meters. If the ball takes 4.4 seconds to fall, find the acceleration due to gravity.

153. budgeting your money

Which one of the following statements best describes a budget "blind spot"? A : To little oney was set aside to cover an expense B. This is an expense the person overlooked or did not account for when setting up the budget. c. This is an item that requires

154. statistics

There are approximately 27 class days for Applied Statistics this semester. If you miss 3 classes, approximately what percent of the course have you missed?

155. chemistry

If a 200-mm test tube is substituted for the gas buret in this experiment(It is a Aluminum Analysis ) ,indicate the additional measurements you will make .

156. Budgeting your money

George's car insurance comes due every six month. What is the best way to budget for this expense? A.He should wait for the premium notices to arrive and pay them from his current income. B.He should put the entire amount of the premium in a savings

157. chem

what is the concentration of a solution with 5 grams of HBr dissolved in 2 liters of water?

158. Math

Produce a third degree polynomial that has exactly the roots -3 and 5 with y-intercept 1350. I understand I could start with (x+3)(x-5)^2, but i don't know how to get the y-intercept 1350 with the same conditions. Please help. thank you.

159. Calculus

Find k such that the line is tangent to the graph of the function. Function: f(x)=kã(x) Line: y=x+4

160. algebra

How can you divide 64 into 2 groups to get a ratio of 3 to 5?

161. biology

what is activation energy?

162. Spanish-I forgot something

I had to change these into present progressive tense Yo escribo would be- Yo estoy escribiendo. Tu bebes un leche. would be Tu estas bebiendo un leche.(accent over u and a) Nosotros bailamos would be Nosotros estamos bailando.

163. geometry

Which statement describes the similarity between sketches and drawings? A Both sketches and drawings are made freehand. B Both sketches and drawings do not require a compass C: Both sketches and drawings do not need drawing tools like a pencil. D. Both

asked by Help Me
164. physics

John is driving at 25m/s. When he brakes, he accelerates at the rate of -5.0m/s^2. How much time did it take him to stop? How far does it take him to stop?

165. math

Ashton broke apart a number into 30 + 7. What number did he start with?

166. geometry

ODEF is a paralleogram. write the missing coordinates of the point E in terms of u,s,and t.

167. math

What is the standard notation for 3 to the 3rd power

168. physics

What upward tension force (in Newtons) would allow a 1240-kg elevator to accelerate downwards (i.e., negative) at a rate of 4.29 m/s/s?

169. United States History

What is Jeffersinans position on funding debts, and justification? His position is that each state should be responsible for its own debt. But I don't know why, or if that is right.

170. calculus

what is the integral of (4x^2-2)/(x^2-6x-40)

why did many native born americans in the late 1800 were in favor of restricting immigration?

3b-9-8b=11

173. English

Does what we watch and experience in popular culture affect the way our families behave? Explain your rationale.

174. Math

2a - 30 +a2b= I don't get this at all.....

175. Chemistry HELP

If 150.0 mL of 1.00 M C6H12O6 are diluted to 750.0 mL, what is the molarity of the final solution? ____ M?

176. Chem112

Compute pH of the saturated solution of La(OH)3 in ther 3x10^-5 M aqueous solution of La(NO3)3xKsp(La(OH)3).

177. physics

person must jump off a balcony at an angle of 20 degrees 10 meters above the ground and land in a window 3 meters away and 8.5 meters above the ground. What should the velocity be in order to make this jump?

178. math

what is 3a squared -5a in factored form?

179. Physics

A projectile is fired with an initial speed v0 at t = 0. The angle between the initial velocity v0 and the horizontal plane is . x y v0 yma

180. physics

The speed of sound in air at 20 degrees C is 343m/s. This corresponds to a speed of ____mi/hr.

181. English

Thank you very much for teaching me both the British English and the American English alternative. By the way, do you say "What time do we land?" Is the use of the simple present correct in this sentence? I just want to make sure the following two

182. social psy

) Researcher wants to look at the correlation between class attendance and grade in class (higher numbers indicating a higher grade). The researcher found the following result r = .82. The correlation coefficient tells researchers two pieces of

183. probabilities

The proportion of red marbels in a large jar of red and black marbels is 0.4 and the percentage of damaged red and black marbels is 0.7. What is the probability of selecting randomly a black and damaged marbel? If you randomly select three marbels, what is

184. English

Can you please check for any errors. And corrent the errors for me. It is due tomorrow morning. Also, let me know if you think this is a descriptive essay. If you think i need to add something else let me know. My Dear Mother She is only about five feet

185. math

How do I solve this problem? 7(q + 2) + 3(2q -1) = -2

186. suranthi

. Write a program which ask the user to enter a sentence (character by character) and when user press full stop (.) character program should display the full sentence and exit.

187. mystery number

What is the three digit mystery number? It is less than 300. The tens digit is 4 more than the hundreds digit. The sum of the digit is 9. The hundreds digit is 2 less than the ones digit.

188. calculus

f(x)=8/(x^2+x+2) Set up an equation, which when solved will give the points where the tangent line has y-intercept 5.

189. physics

A speedboat starts from rest and accelerates at +1.68 m/s2 for 5.43 s. At the end of this time, the boat continues for an additional 8.16 s with an acceleration of +0.475 m/s2. Following this, the boat accelerates at -0.866 m/s2 for 7.54 s. (a) What is the

190. calculus

find all points at which the tangent line to the graph of y=x3 is parallel to the line y=27x+5

191. Government US

This is not a homework.. but I was just wondering... was the US government forced to start imperialism ? Was it because of the cold war US was dragged into the worldly affairs?

192. Chemistry

If C + CO2 Co, when equilibirum is established at 1000 K, the total pressure in the system is 4.70 atm. If Kp= 1.72, what are the partial pressures of CO and CO2?

193. PHYSICS

Two vectors and have magnitude A = 2.90 and B= 3.00. Their vector product is A X B= -4.91 + 2.08. What is the angle between A and B?

194. algebra

simplify 26-3*2/4^4+3^4 26-6/256+81 20/337 125-2*5/3^3/3^2-(-3)^2 125-10/27/9-(-9) 115/3-9 115/27 want to know if these two problem right

195. algebra

How many 5 digit number greater than 24000 can be formed if repetition of digit is allow.

asked by vinit singh
196. Global History ( persians and assyria)

differences between Assyria empire and persian empire

197. physics

person must jump off a balcony at an angle of 20 degrees 10 meters above the ground and land in a window 3 meters away and 8.5 meters above the ground. What should the velocity be in order to make this jump?

198. government

hey i need help in this question Is there ever a time where american citizens disagreed with the way the government is handling things in the past?

199. Chemistry

how many ions and moles does 113 mL of .490 M aluminum chloride have?

200. Calculus

About rationalizing denominator, is it true that you can't always multiply by the same square root denominator to get a perfect square?

201. Math

The homothetic geometry on C is (C,H) where H is the group of scaling of C. Which figures are congruent in (C,H) to the circle of radius 1 centered at 1? How could you describe the congruence class in language understandable by a high school geometry

202. s.s

what landforms do the Chinook Native Americans live near?

203. Home insurance

Another term that means the same thing as "insurance company"is: A."insurance agent" B."insurance broker" C."the insurer" D."the insured" I got b.

204. MATH

liz earns a weekly salary of \$459 and \$20 per hour for each over time hour she works. this week her total pay including salary and overtime was \$559. write an equation.how many hours of overtime did liz work?

205. math

the quotient of -54 and 9, suntracted from 8 times a number is, -18

206. physics

a low velocity mortar round is fired upward at an angle of 50° from the horizontal with a launch velocity of 40 m/s

207. Math - Division

I can't quite solve this question. Of 98 bicycles in a bike rack, 67 are mountain bikes. What fraction of the bicycles are not mountain bikes?

asked by Alex L.
208. Math

Jason makes two pictures. Picture 1 is made with the help of a pencil and picture 2 is made with the help of a pencil, compass, and protractor Which statement best compares the two Answer: A:Picture 1 is a drawing because it does not use measuring tools

209. geometry

If the height of a triangle is one inch more than twice its base, and if the area of the same triangle is 20 square inches, find the base and height of the triangle.

210. English

Thank you. Here are a few sentences I wrote on travelling by train. I don't know the correspondent English terms. I hope you can help me. 1) Check the train times and the fare. Then buy your ticket at the ticket office. You can buy a single or a return

211. geometry

what would be the radius of a circle that can be inscribed in a triangle with sides of 35, 29 and 64?

212. Math

Martin and Patrick have a model of an airplane which they want to duplicate. Martin uses a string and ruler to make approximate measurements of lengths to duplicate the picture. Patrick uses a pencil and paper and duplicates the picture without the help of

asked by Help me
213. Quotes

i.) When elephants fight, it’s the grass that suffers ii.) I’ve missed more than 9000 shots in my career. I’ve lost almost 300 games. 26 times, I’ve been trusted to take the game winning shot and missed. I’ve failed over and over and over again

214. P chem

why does the Shroedinger equation have a specific operator for kinetic energy and only a general expression (V) for potential energy

215. physics

a car requires a velocity of 32 m/s assuming that its acceleration is uniform, what is its value?

216. geography

My child needs to name three seas that surround the Philippines. He answered The Celebes sea, South China sea and the Arafura sea. I do not think the Arafura sea is correct and I told him to put the Philippine sea instead of the Arafura. Am I correct in

asked by Mom has a question
217. science

What factors do you think make an element valuable?

218. budgeting your money

Which of the following items should be martis top priority in budgeting her disposable income? A. Covering the rent for her apartment B. Interior decorations and furniture C. A new set of dishes for her kitchen D. Her long-desired trip to the bahamas I got

219. algebra

simplify 26-3*2/4^4+3^4 26-6/256+81 20/337 125-2*5/3^3/3^2-(-3)^2 125-10/27/9-(-9) 115/3-9 115/27 want to know if these two problem right

220. english

A list of works cited should include: a.All the works you read while writing your paper b.All of the works you used in your paper. c.All of the works you could find while writing your paper. i think its b.

221. physics

A car starts from rest and accelerates for 6.5 s with an acceleration of 3.6 m/s2. How far does it travel? Answer in units of m

222. pre ap chemistry

how many CaI2 are presented in 3.28 moles?

223. geometry

If EF = 4x - 19, FG = 3x - 9, and EG = 28, find the values of x, EF, ad FG.

224. Language Arts

In the sentence....It formally accepted the bride into the groom's family. Would accepted be a mental action verb or a physical action verb?

225. math

regroup 22: 2 tens, 2 ones; 1 ten, 12 ones Name the word that describes what was done to show the number in different ways.

226. history

Which of the following did the Mayans consider to be worthy of recording? A. The laws of their society B. Ceremonial rituals C.Trade records D. Information about everyday life *please if you can explain I have read the text for this section over and over

asked by katelynn(pennfoster student)
227. Foreighn Languages

What Language should I learn? Mandarin or French?

228. history

What did islamists spread throughout the Old World starting in the eighth century? A. New crops B. metals used to make new weapons C. Democracy D. Disease

asked by katelynn(pennfoster student)
229. social psy

I want to utilize a true experimental design to study the effects of classical music exposure on the cognitive development of newborns. a- What is an independent variable? b- What is a dependent variable? c-What is random assignment? d-Why is random

230. calculus

How do you estimate derivatives when you don't know the actual equation of the line on the graph, but you have just a picture of the graph?

231. Chemistry

The speed of sound is 3.40 times 10^4 cm/sec. What distance in meters can sound travel during a 48-minute chemistry lecture?

232. General Physics

two men decide to use their cars to pull a truck stuck in mud. they attach ropes and one pulls with a force of 526 N at an angle of 32deg with respect to the direction the truck is headed, while the other car pulls with a force of 788 N at an angle of

asked by Jane Mitchell
233. physics

In an historical movie, two knights on horseback start from rest 72.6 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.280 m/s2, while Sir Alfred's has a magnitude of 0.250 m/s2. Relative to Sir

234. calc

how do i find the derivative of 16^(sinx)

235. Chemistry

A box measures 8.5 meters long, 7.5 meters wide and 0.25 meters deep, calculate the volume

236. budgeting

George's car insurance comes due every six month. What is the best way to budget for this expense? A.He should wait for the premium notices to arrive and pay them from his current income. B.He should put the entire amount of the premium in a savings

237. Pre-Algebra

Make a table with all the whole number pairs of length and width values that give an area of 24 square meters.

238. math

An empty glass jar weighing 1.54 kg is in the shape of a cylinder which has a radius of 14cm and a height of 20cm. Calculate how many litres of water it will hold when filled to the top.Also calculate its weight when it is filled with water (take pie=22/7)

239. English

I urgently need to know if the word choice and tenses are correct. Thank you. 1) Enter the airport and check your flight number and the boarding time of your flight on the departures board. 2) Before going to the check-in desk make sure your baggage

240. Physics

An astronaut has crash landed on a planet that little is known about (not even the acceleration due to gravity). She must descend a steeo cliff to find shelter, but wants to know how high the cliff is before making the attempts. She happens to have

241. geography

Am I correct in saying that mountains are the landform that separates Europe from Asia?

242. English

Can some help me with a topic to write a personal narrative?

243. History

Who was the first thinker to postulate that numbers are real, not abstractions? A. Hui Shih B. Parmenides C. Pythagoras D. Aristotle *please explain i don't understand this.

asked by katelynn(pennfoster student)
244. math

factor the polynomials x^2 -6 x^2 +5x-6

245. Physics

if the speed of the block is 9.5 m/s at the bottom of the ramp, from what height was the block released? what is the length of the ramp?" and i know that the mass is 7 kg, initial veloctity=0, it is frictionless, and inclined at an angle of 62 degreesif

246. AED/201

Research the use of technology in schools from 1980s to Present. Must discuss a minimum of 2 events per decade, for a total of atleast 6 events

247. health care

why is teenage pregnancys important for health care administrators to study.

asked by HELP??????? thanks!
248. college general chem

If 15.0 of is dissolved in enough water to form 270 of solution, what is the molarity of the solution? What is the oxidation state of an individual sulfur atom in ? What is the oxidation state of an individual nitrogen atom in ?

249. Math

1.) 4(2-a)^2-81 2.) -(x-y)^3 3.)3x^2-27(2-x)^2 4.) 9(y-1)^2-25

250. math

Ashton broke apart a number into 30 + 7. What number did he start with?

Can you please check for any errors. And corrent the errors for me. It is due tomorrow morning. Also, let me know if you think this is a descriptive essay. If you think i need to add something else let me know. My Dear Mother She is only about five feet

252. science

sandy built a ramp to test how gravity affects the movement of a cart. she wants to find out how height affects the speed of the cart. design an experiment for sandy to use

253. math

type 8580 words in 2hrs and 45mins

254. us history

Im doing a crossword and im stuck on the last one. the topic is immigration and urbanization. 1. neighborhoods on the outskirts of a city..?

255. social studies

Chris must sit out the next two weeks of basketball games because of a problem with her hamstring muscle. Her eighth grade coach tells her to use this off time imagining herself out on the court. He wants Chris to feel her body running down the court, to

256. chemistry

Im really confused....Im being asked to find the highest pH of HI, KOH and HNO3 all with a concentration of 0.10M. I understand HOW to find it: ph=-log[concentration of H]....but wouldn't that technically mean the pH of HI and HNO3 are the same?!

257. Math help please

1.) 4(2-a)^2-81 2.) -(x-y)^3 3.)3x^2-27(2-x)^2 4.) 9(y-1)^2-25

258. psychology

Janice smokes while she is pregnant with her son. He is more likely to have: a. a normal IQ b. a lower IQ c. a higher IQ d. an IQ below 90 I choose B, is this right?

259. math

what is the compaing x miles to 1 hour?

260. Chemistry Help

If 230.0 mL of 0.100 M H2SO4 are mixed with 280.0 mL of 0.300 M H2SO4, what is the molarity of the final solution? in M

261. Budgeting your money

jamal currently earns 20,000 a year in gross wages, On january 1. he is due to receive a 2% COLA. What will his gross income be after the COLA takes effect? A.\$19,600 B.\$20,100 C.\$20,400 D.\$24,000 I got C.

262. PHI 103

Putting an argument into premise-conclusion form can make it easier to

263. physics

person must jump off a balcony at an angle of 20 degrees 10 meters above the ground and land in a window 3 meters away and 8.5 meters above the ground. What should the velocity be in order to make this jump?

264. math

Does the median or mean best describe the typical size of the tour shown in the table above?explain.

265. physics

person must jump off a balcony at an angle of 20 degrees 10 meters above the ground and land in a window 3 meters away and 8.5 meters above the ground. What should the velocity be in order to make this jump?

266. Calculus-Rationalizing Denominator

I am very confused on how to rationalize a denominator, it just gets harder and harder.*will be using the V symbol again as a square root symbol.* I get how to rationalize something simple as V2/V7, I would get V14/7 as the answer, but I get confused on

267. Socials Telegram ms. sue

Thanks for helping me with the telegram. Was my headline okay?

268. math grd 10

factor the polynomials x^2 -6 x^2 +5x-6

269. science

what is the diameter orbit and planet mass of hydra the moon of pluto.

270. math

the decimal for 15%

271. calculus

the value of f(4) is negative, but the function is increasing rapidly at x=4

272. Math

Vats that have the capacity to hold 45 quarts, and if each bottle contains 9/21 quart, how many bottles can be made from each vat?

273. math

a percent for 3/8

274. math

a percent for 0.9 decimal

275. communication

What are some froms of medium in popular culture?

276. Geometry

wats the areas of a rectangle... base of : 5m high of: (4a+b)m

277. Spanish

How would I say I prefer this papagayo because it is prettier than those papagayos? Would it be: Yo prefiero este papagayo porque es mas bonito que estos papagayos.

278. Social Studies/Law

Briefly describe the following court cases or laws/Acts by identifying (for each one): -The constitutional amendment or law involved -The opposing sides of the issue -The relationship of this particular legal issue to the larger issue of diversity: ethnic,

279. college general chem

If 15.0 of is dissolved in enough water to form 270 of solution, what is the molarity of the solution? How many milliliters of 4.45×10−2 contain 4.05 of solute

280. n/a

why use phenolphthalein instead of methyl violet in a titration?

281. Algebra 2

Is this system of equations inconsistent? Is it dependent? x = 3y + 4 6y = 2x - 6

282. math

5,25,50,10 what are the next 3 numbers?

283. Socials

Visualise yourself as a reporter sent to cover the Fraser Canyon rockslide. Send a telegram to ur newspaper describing the disaster, include a headline. ROCKSLIDE VERY DISASTROUS STOP! Massive fallen rocks have blocked the river. There is an increase in

284. math

Given the formula X=x to the power of 2 + y to the power of 2 can you find X if x=9,y=negative 4,z=1/2?

285. information technolgy

hi I have a project to do on netbeans but I am having problems.The project is you have to enter a message and there must be a encryption button,when you click on the encryption button the message must get encrypted.Can you help me out with the encryption

286. science

What factors do you think make an element valuable?

287. English

Here are some sentences on the same theme I'd like you to check. I included a few sentences on reading habits and a few words I don't know if they exist. 1) Is the verb "punch" correct in the sentence: Punch your ticket (check), then go on the platform.

288. math

fraction for15%

289. ped212

Discuss the differences between process and product evaluation. Give examples of each type of evaluation. Discuss the value of each type of evaluation. What is the significance of focusing on the process in physical education? How does this information

290. Chemistry Help!

To what volume must 290.0 mL of 4.50 M Al(NO3)3 be diluted to produce 2.40 M Al(NO3)3? ____ mL?

291. grammar

is this question correct? How much holiday had they?

292. English

Thank you both for helping me. I just wanted to know if the folliwing two words are correct:"them" and "alerts". 1) Go through security and show your passport.Put your hand luggage and any metal object in a basket for them (?) to be scanned. 2) Then walk

293. math

18/24 divided by 32=?????

294. Math

Can someone please help me figure out the mean, standard deviation, raw score, and z-score of 27,3,4,16,0.. Any help is super appriciated.. thanks sooo much.

295. math

find a fraction of 20%

296. English

Here is the second part of my summary. Can you please check if everything is OK now? By the way, do you say "On which carriage or in which carriage is your seat?" Which bus number goes to the city centre OR Which number bus goes ....? 1) Go into the

297. chem

number of moles in 22.6g C3H7OH

298. psychology

thanks for your help

299. math

a fraction for 0.9 decimal

300. geometry

1.what is the base of the rectangle for stage # 12? 2.what is the height of the rectangle for the stage #14? 3.what is the perimeter of the rectangle for stage #10? 4.if the base of the rectangle in 36,what is the stage number?

301. history

Which of the following empires rose to have tremendous influence despite having poor resources, a non-strategic location, no precious metals, and poor soil? A.Hittite B.Roman C.Persian D.Chinese *please explain i don't understand B. C. D.

asked by katelynn(pennfoster student)
302. trig

1-cos/1+cos= 2(cosec-cot)

303. math

i need the fraction for3/8

304. General Physics

a force is applied to a 1.9 kg mass and produces a 3.1 m/s^2 acceleration. what acceleration would be produced by the same force applied to a 14.3 kg mass? answer in m/s^2

asked by Jane Mitchell
305. visual basic

i have a project due where i have to build a multitier application (presentation and services tiers). The instructor hasn't gone over what any of this and I don't know where to start. It's due Saturday.

306. Astronomy

Explain what occurs during tidal friction?

307. math

draw a diagram three eights of the 56 resteraunts in town were closed on monday a.how many resteraunts were closed omn monday b.how many resteraunts were open in town on monday

308. math

write 25.45 in expanded notation

309. math

about what percent of the total population believe saying the early bird catches the worm to be true 136,800,000 believed this to be true

310. maths

a car travels at a speed of 35mph how long would it take a car to travel 7miles

311. English

I left out a few words I'd like you to check. I think sentences 4-5-6 are too confused. Would you please help me check them? Thank you. 1) Can I have an aisle/window seat? Can I have a seat in the front (of the aircraft)? 2) We'll have to make a

312. math

Subtract the sum of 81.6 and 4.07 from 129.4

313. Geometry

Find the intercepted arc if the radius is 9ft and the area of the sector is 179.54

314. math

what is the diameter orbit and planet mass of hydra the moon of pluto.

315. Mechanics

What does a polar moment of inertia depend on?

316. English

I think I used "punch" incorrectly. 1) What do you call the machine into which you insert your train ticket and you get the date and time stamped on it (??). Before you go on the train, you have to ..... your ticket.

317. math

write three number sentences where difference is 50.

318. social studies

how do you think technology will be change this area? education

319. math

If I lease equipment for 60 months and the original price is \$20,000 at an interest rate of 12%, how much is my monthly payment?

320. geography

Ms. Sue the capital city is Quito, Ecuador. Is this right? If not can you give me a better map to look at???

321. rounding

is 84 rounded to 90 or 80

322. math

solve[1.67*10^(-7x)-10^(-6055x)]

323. arithmetic

show how to find the sum by a ten hundred or thousand

324. math

write the unit rate of2 into 50

325. math

9x+6-4x=8 ---------- 2

326. Math

multiply and simplify 9/7*9/6

327. MATH

multiply 138* 29/46*7/9 give answer as a whole ormixed number????? this is a foreign language to me please help!!!

-84/43 -7y=7