# Questions Asked onFebruary 13, 2017

1. ## math

There is a unique parabola that goes through the points P = ( 1, 1), Q = (1, 1), and R=(5,6) that can be described by y=ax^2 +bx+c. Find coefficients a, b, and c.

2. ## math

The diameter and the slant height of a cone are both 24 cm. Find the radius of the largest sphere that can be placed inside the cone. (The sphere is therefore tangent to the base of the cone.) The sphere occupies a certain percentage of the cone’s

3. ## math

v\left(t\right)=5-tv(t)=5−t represents the velocity of an object over the interval [0, 7] in meters per second. What is the displacement of the object over the time interval?

4. ## math

v\left(t\right)=5-tv(t)=5−t represents the velocity of an object over the interval [0, 7] in meters per second. What is the total distance traveled of the object over the time interval?

5. ## math

Estimate the value of \int^7_4\left(1+x^2\right)\sin x\:dx, make sure that your answer has 3 decimal places.

6. ## math

t (seconds) 1 3 4 7 v(t) (meters/second) 20 32 42 52 The table shows the velocity (in meters per second) for an object over the interval [1.7]. Estimate \int^7_1v\left(t\right)dt∫17v(t)dt using 3 subintervals and the Left Hand Riemann Sum.

7. ## math

R\left(t\right)=4t^2-3tR(t)=4t2−3t represents the rate of an object over the interval [5, 30]. What is the average rate of the object over the time interval?

8. ## math

What would be a person target heart rate be if they are 14 years old? I know it starts like 220-14=206 but then what... Please help

9. ## Chemistry (ap)

using the measured value of the extinction coefficient for CV ( extinction coefficient = 87,000 M−1 cm−1 ) calculate the [CV] for and abs of 0.9562

10. ## math

(a) Make a table of values rounded to two decimal places for the function f(x) = ex for x = 4, 4.5, 5, 5.5, and 6. Then use the table to answer parts (b) and (c). (b) Find the average rate of change of f(x) between x = 4 and x = 6. (Round your answer to

11. ## Math 115

Create a piecewise function of the following scenario where D(t) is the total distance walked (in miles) as a function of time t (in minutes): “You begin a walk from your home at a fast pace of 6 miles per hour for 30 minutes. You rest for 10 minutes,

12. ## Math 115

Consider the amount of gas in your car during a road trip. You start out with 45 gallons and drive for 4 hours, leaving you with 27 gallons in the tank. You stop for lunch for 2 hours and then drive for 2 more hours, leaving you with 18 gallons. t= time C

13. ## College Algebra

suppose you go on a road trip, driving at a constant speed of 75 miles per hour. create an equation relating distance ,d, in miles and time traveled, t, in hours. d= __?__

14. ## Math

What is the area of a rhombus with: Side=8 cm Acute angle between one pair of sides=30 degrees Please don't use trigonometry as I'm in Class 7. Thanks in advance.

15. ## math

Iam not able to get this one.sides of a rectangular plot of land are measured correct to nearest metre.measurement s given as 20m by 3m.so what is upper bound of the plot length?,the least possible perimeter of the plot?

16. ## Maths

Show that the mid point of line joining points (-5,12) and (-1,-12) is a point of trisection of the line joining the points (-8,-5) and (7,10).

17. ## Maths

AB is a line segment and M is its mid point. Semicircle are drawn with AM,MB and AB as diameters on the same side of line AB. A circle (O, r) is drawn so that it touches all 3 semi circles . prove that r=1/6 AB.

18. ## Math

Mr. Letterman has an unlimited amount of 5-cent stamps and 7-cent stamps. What is the largest amount of postage that he cannot make?

19. ## Chemistry

which compound shows small change in solubility from 0°C to 100°C?

20. ## Comprehension

Volunteer Spotlight: Jane Birch Meet Jane Birch: Having always been described as the “Merry-Little-Helper”, Jane simply loves doing things for other people. Through her passion for volunteering and dedication to serving the community, Jane has always

21. ## math

The table shows the results of drawing one marble from a bag of colored marbles. Each marble was replaced after the outcome was recorded. If there are a total of 50 marbles in the bag, about how many of the marbles are black? A.15 B.6 C.12 D.9

Simplify the cubed root of 432x to the 12th power

23. ## Social Studies

Quote: We seek no conquest. All we ask is to be let alone." - Jefferson Davis According to this quote, which statement best summarizes the South's agenda? ~ to continue their way of life unchanged *** ~ to accept changes to the plantation system ~ to

24. ## Trigonometry

A point on the rim of a wheel of unknown radius in a pulley system has a velocity of 16 in/min. The wheel is making 4 rpm. If the radius of the other wheel is 8 inches, find the 8" wheel's rpms and the unknown wheel's radius. I got a radius of about 0.637"

25. ## Maths

Find the sum of the first eight terms of a linear sequence whose first term is 6 and whose last term is 46

26. ## Computer(E-mail)

can anybody understand mr about E commerce ??

27. ## ELA and Please Hurry!!!!

Not only is the race special because it takes place on a special day, but it also has a rich, over three-decade tradition. While the Boston Marathon can declare it is the oldest road race in America, few 10K’s can claim they’ve been around longer than

28. ## physics

calculate angular momentum and rotational kinetic energy of earth about its own axis

How do you know if a radical expression is in simplest form?

30. ## Algebra

A ball is thrown into the air with an upward velocity of 26 feet per second. Its height, h, in feet after t seconds is given by the function h(t) = –16t^2 + 26t + 5. a. How long does it take the ball to reach its maximum height? Round to the nearest

31. ## Algebra

What is an equation for the line with slope 2/3 and y-intercept 9? A. Y=2/3x B. y=9x C. Y=2/3x+9 D. y= 9x+2/3 Q2. Suppose Y varies directly with X, and Y=24 when x=8. what is the value of Y when x =10. A. 10 B. 30 C. 80 D. 240 .

32. ## ELA

Which of the following citations in a works cited page uses proper MLA style? A.Paul Smith. The Night on the River. New York:Penguin,1987.print B.The Night on the River. Smith,Paul. New York:Penguin,1987.print C.Smith,Paul."The Night on the River."New

33. ## History

Why would new citizens need to know about the Dust Bowl of the 1930s? I have lots of info for my paper. I just need to know why the new citizens should know about this fact. I have no idea where to even begin. I thank you in advance for any help given. I'm

34. ## Calculus

Differentiate each 1. Y= 1/x + 3/x^2 + 2/x^3 2. Y= x^5(1+ x)^5 3. Y= 4-x^2 / 2x+3 Can someone help me I'm lost

35. ## chemistry (ap)

using the measured value of the extinction coefficient for CV ( extinction coefficient = 87,000 M−1 cm−1 ) calculate the [CV] for and abs of 0.9562 (CV stands for Crystal Violet)

36. ## physics

When the temperature of a thin silver [α = 19 × 10-6 (C°)-1] rod is increased, the length of the rod increases by 3.6 × 10-3 cm. Another rod is identical in all respects, except that it is made from gold [α = 14 × 10-6 (C°)-1]. By how much ΔL does

37. ## Science/Weather

Satellite images help meteorologists in all the following ways except: a) monitoring changes in the strength of storms b) locating areas of high and low pressure systems. c) predicting rainfall amounts d) recording daily high and low temperatures. I think

38. ## Math

Can someone please help me understand box-and-whisker plots? I get really confused on what each thing is and how to plot it. Thanks.

39. ## science

a body moving with an inertia velocity of 30m/s accelerate uniformly at a rate of 10m/s until it attends a velocity of 50m/s.what is the distance covered during this period?

40. ## Chemistry

Trimix 10/50 is a gas mixture that contains 10% oxygen and 50% helium, ant the rest is nitrogen. If a tank of Trimix 10/50 has a total pressure of 2.07 x 10 4 kPa, then what is the partial pressure of helium?

41. ## life orientation

5 demographic structures of south Africa and their roles

42. ## math

a gumball machine contains orange yellow and purple gumballs the probability of getting an orange gumball is 3/4 the probability of getting a yellow gumball is 1/6 if there are 36 gumballs in the machine how many are purple?

43. ## Science!

What changes would a cold front bring to a warm, dry area? A)extended period of rain B)several gray skies C)dry and asunny skies D)rain or thunderstorms I think it is either a or d but I am leaning more to a, so please help!

44. ## math

write a ratio and percent for the shaded area. total of 20 squares 6 shaded squares A. 6/25 30% B. 3/50 6% C.6/25 24% D.3/10 30%

45. ## Math

Two fire wardens are stationed at locations A and B, which are 50 km apart. Each warden sights the forest fire at C. Given that angle CAB is 52 degrees and CBA is 43.0, find the distance from C to the nearer warden, to the nearest 0.1 km

46. ## Social studies

Which of the following was the first major battle of the civil war

47. ## physics

A car moves in a straight line with constant acceleration. Starting from rest at t=0 it travels 8.0 m in 4.0 s. What is the speed of the car at t= 4 s. PLEASE explain :)

48. ## physics

a 5.4 kg ball slides along a friction-less, horizontal surface at 6.2 m/s. The ball then encounters a ramp which slopes upward. The ball slides up the ramp, slowing down until it stops and slides back down. what is the kinetic energy of the ball as it

49. ## Health i thin ! PLZ HELP ASAP!!!!

Which of the following is not a type of fat? A.bi fat B.trans fat C.saturated fat D.unsaturated fat

-2(-x-5)+1=5

51. ## Math

Joe was driving at a rate of 60 mph. As he approached a curve in the road, his speed was 51 mph. What was the % change in Joe's speed?

52. ## 099 math

2(2x-7)-16=3(-x-7)-11

53. ## Math

if the union member is able to invest their $12,000 is a fund that pays 1.8% compounded continuously, in how many years will the future values be worth$20,000?

54. ## math

3(x+4)-5= n is 9

55. ## Geometry

What is the most precise classification of the quadrilateral formed by connecting the midpoints of the sides of the isosceles trapezoid?

56. ## physics

A vector has the components Ax=−37m and Ay=44m. Part A What is the magnitude of this vector? Express your answer to two significant figures and include appropriate units. the answer for part A is help me with b pls 57 m Part B What angle does this vector

57. ## English

1. Read the following passage from "The Women's Baths." "I have never known my grandmother to be so generous and open-handed as on the day which we spent at the market baths. She was pleased and proud as she listened to the blessings called down on her by

58. ## Social Studies

How did the supreme Court decision in Worcester v. Georgia and the Indian Removal Act lead to the removal and resettlement of Native American grops The Indian Removal Act leads to the removal and resettlement of Native Americans because the other states

59. ## math

A skydiver jumps from an airplane at an altitude of 2,500 ft. He falls under the force of gravity until he opens his parachute at an altitude of 1,000 ft. Approximately how long does the jumper fall before he opens his chute? h(t) = -16t2 + vt + h0 A. 2.4

60. ## PHYSICS

Vector A⃗ points in the negative x direction and has a magnitude of 22 units. The vector B⃗ points in the positive y direction. partA:Find the magnitude of B⃗ if A⃗ +B⃗ has a magnitude of 37 units. partB: Sketch A⃗ and B⃗ . Draw the vectors

61. ## english

Change the voice into avtive and passive

62. ## 099

2(2x-7)-16=3(-x-7)-11 After getting rid of the () 4x-14-16=-3x-21-11 Where do I go from here?

63. ## PHYSICS

PLEASE HELP WITH PART E AND F THANKS!! Find the direction and magnitude of the following vectors. A⃗ =( 22 m )x^+( -15 m )y^ Express your answer in degrees using three significant figures. θA = THE ANSWER IS-34 Part B Express your answer in meters using

65. ## chemistry

How can we separate a mixture of iron filings and sodium chloride

66. ## honors eng 3

which of the following is NOT a characteristic of Twain's frame narrator in "the celebrated jumping frog of calaveras county"? he is a well-educated man he speaks in the first person point of view he expresses frustration and disinterest he speaks

67. ## Math

How many three-digit counting numbers are exactly divisible by 6 but not also exactly divisible by 9?

68. ## English

What is the interpretation of Lines 1-8 of: On the Pulse of Morning? I honestly don't know what the author wants the reader to understand in this poem. It seems like an unsolvable question.. Anyone know at least a little about how to interpretate this

69. ## pre algebra

what is the ratio 8 to 60 written as a fraction in lowest terms

70. ## Chemistry

what is the concentration of I- before the reaction when 35 ml of 0.23M KI is mixed with 15 ml of 0.15M Fe3+ 2I- + 2Fe3+ --> 2Fe2+ + I2

71. ## value

ACAR OF MASS 1200KG TRAVEL OF SPEED OF 20M PERSECOND IF ITS ENGINE DEVELOPS INTO 3KW,FIND THE FORCE USED

72. ## Math

Chad buys peanuts in 2-pound bags. He repackages the into bags the hold 5/6 pound of peanuts. How many 2-pound bags of peanuts should chad buy so that he can fill the 5/6-pound bags without having any peanuts left over?

What would be a person target heart rate be if they are 14 years old? I know it starts like 220-14=206 but then what... Please help

74. ## PHYSICS

A box is measured to have a length of L=(10.0+_0.01)FT A WIDTH OF W=(1.534+_0.002)FT AND A HEIGHT OF H=(0.013+_0.001)FT. FIND THE VOLUME OF THE BOX .WRIE THE EXPRESSION FOR V IN THE FOR OF EQUATION 2-3 AND FIND TTHE EXPRESSION FOR SIGN STANDARD DEVIATION

75. ## English composition

Write a debate on the against the motion men should help at the kitchen

76. ## Social Studies

Why did miners in the West create groups of vigilantes? A. To clear Forests and prepare for mining B. To take control of claims from businesses C. To enforce laws and punish criminals D. To replace independent contractors B?

77. ## Social Studies

3 which U.S. region was most impacted by the completion of transportation of the transcontinental railroad in 1869 A South B west ** C east D North

78. ## math

the volume of a right rectangular prism is 36 cubic units. list at least 3 possible lengths widths and heights that this shape could have

79. ## Math

1. Identify the decimal And simplified fractional form of 60%. A. 0.6 and 4/5 B. (0.6 and 3/5) C. 0.06 and 3/5 D. 0.06 and 6/10 2.A baseball team wins 45% of its games. What fraction of games does it win? A. 8/20 B. 9/25 C. (9/20) D. 8/25 3. According to a

asked by Help I need somebody not just anybody
80. ## chemistry

If there are 2.871mol of gas present at a temperature of 200.0K and a pressure of 1.009atm, what would the volume be?

81. ## Social Studies

What were some elements of the Reconstruction Act

82. ## s.s

where were most native americans in north america located when europeans arrived? there are no choices so just help me with this someone please help please!!!!!

83. ## Biology

how many grams of sucrose would I need to make 350mL of an 18% solution?

84. ## Math-Geometry

For coordinates A(1,-4) B(5,-1) C(8,-5) D(4,-8) Prove ABCD is a rectangle through the use of a coordinate paragraph.

85. ## chemistry

determine the mass of carbon4oxide produced from burning 104g of ethyne

86. ## math

if the sum of interior angel of a regular polygon is 30 degree right angel .how many sides has it?

87. ## Cal 1

S=6t^3+8t^2+5 -3≤ t≤ -1 Find the body's average velocity for the given time interval.

Jade is painting a rectangular wall. The wall is 4 1/4 yd long and 2 2/3 yd high. The formula for the area of a rectangle is A=bh. What is the area of the wall? I think the answer is 11 and one thirds.

89. ## Chemistry

A reaction requires 22.4 L of gas at STP. You have 30.5 L of gas at 101.5 kPa and 373 K. Which of the following statements is true? (Use the ideal gas law: PV = nRT where R = 8.31 L-kPa/mol-K.) You will have excess gas for the reaction. You will have

90. ## math

A spinner has three congruent sections labeled 1, 2, and 3. On the first two spins, the arrow stops on 1 and then 2. What is the probability that on the third spin the arrow will stop on 3? A.1 B.2/3 C.1/3 D.0

91. ## Algebra

When mushrooms are dried, they lose 80 percent of their mass. What weight of mushrooms must be picked to get 1 kg of dry mushrooms?

92. ## physics

A particle moving in simple harmonic motion passes through the equilibrium point (x=0) 9 times per second. At t=0t=0 its velocity at x=−0.01 m is negative. It travels 0.4 m in a complete cycle. The particle's position as a function of time is described

93. ## physics

The displacement of a block attached to a horizontal spring is given by x=0.5sin(7.8t−1.06)m What is the earliest time (t>0) at which x=0.16m? Find the acceleration when x=0.44m helppppppp

Some wore shiny rocks on their heads. I know on their heads is preposition but confused if it's adjective phrase because it describes rocks or adverb phrase because it answers where rocks were worn. She Wins the Race, Morning Girl's mother, had said a new

95. ## physics

A car moves in a straight line with constant acceleration. Starting from rest at t=0 it travels 8.0 m in 4.0 s. What is the speed of the car at t= 4 s. PLEASE explain :)

96. ## Science

Plants use nutrients that_______ adds to soil. 1.bedrock 2.sand 3.loom 4.humus I think it's humus.

97. ## Math

A wire 32 cm long is cut into two pieces. The longer piece is 6 cm longer than the shorter piece. What is the length of the shorter piece?

98. ## math

andy counted his steps as he walked halfway around the school. he counted 654 steps. about how many steps is it around the school?

99. ## physics

With a block of mass m , the frequency of a block-spring system is 1.8Hz. When 50g is added, the frequency drops to 1Hz . Find m and the spring constant.

100. ## Socials

I want to know what these points mean please and thank you. I'm trying to describe middle class gentry. it is a territorial elite. It transcends status derived from service or personal association on the one hand and the authority derived from mere

101. ## physics

A block attached to a spring is displaced from equilibrium to the position x=+0.5m and released. The period is 2.1s . At what positions and times during the first complete cycle do the following conditions occur. a) |v|=0.5vmax, Where vmax is the maximum

102. ## physics

A 750g block is attached to a vertical spring whose stiffness constant is 1N/m . The block is released at the position where the spring is unextended. a) What is the maximum extension of the spring? How long does it take the block to reach the lowest

103. ## Pre-Algebra

He said it to his sisters, he said it to his brothers, what did the witty raindrop elclaim to all the others?

104. ## physics

A 300g particle oscillating in SHM travels 35cm between the two extreme points in its motion with an average speed of 30cm/s. Find: a) The angular frequency. b) The maximum force on the particle. b) The maximum speed.

105. ## p

The displacement of a block of mass 778g778g attached to a spring whose spring constant is 38N/m38N/m is given by x=Asin(ωt)x=Asin(ωt) where A=25cmA=25cm . In the first complete cycle find the values of xx and tt at which the kinetic energy is equal to

106. ## physics

The displacement of a block of mass 778g attached to a spring whose spring constant is 38N/m is given by x=Asin(ωt) where A=25cm. In the first complete cycle find the values of x and t at which the kinetic energy is equal to one half the potential energy.

107. ## Introduction to negative linear relationships

Write an algebraic equation. For the altitude, d,based on the number, m.

108. ## Stat

The lengths of pregnancies in a small rural village are Normally distributed with a mean of 268 days and a standard deviation of 12 days. What percentage of pregnancies last beyond 290 days?

109. ## Chem

21.7 mL of 1.15 M KOH (aq) was required to titrate 25 mL of H2SO4 (aq) as follows: H2SO4 (aq) + 2KOH (aq) --arrow-- K2SO4 (aq) + 2H2) (l) What is the molarity of the H2SO4 (aq)?

110. ## Chem

Specify the concentration of each ion in solution for the following: .10 M AlCl3 (aq) and .15 M (NH4)2SO4 (aq)

111. ## History

I want to know what these points mean please and thank you. I'm trying to describe middle class gentry. it is a territorial elite. It transcends status derived from service or personal association on the one hand and the authority derived from mere

112. ## into to algebra

You need a 45% alcohol solution. On hand, you have a 150 mL of a 15% alcohol mixture. You also have 70% alcohol mixture. How much of the 70% mixture will you need to add to obtain the desired solution?

113. ## Math

Says to write a variable expression. An auto repair bill is $220 for parts and$45 for each hour of labor. If h is the number of hours of labor, express the amount of the repair bill in terms of the number of hours of labor. Please help I really don't

114. ## Algebra

Translate into a variable expression. Then simplify the expression. Twice the sum of four times a number n and thirty. Can you explain how to write it as a variable expression pls Also what does "and" stand for here?

115. ## algebra

A man flies a small airplane from Fargo to Bismarck, North Dakota --- a distance of 180 miles. Because he is flying into a head wind, the trip takes him 2 hours. On the way back, the wind is still blowing at the same speed, so the return trip takes only 1

116. ## calculus

can someone help me with this problem y=x^2 -9 represents the velocity of an object over the interval [1, 5] in meters per second. What is the displacement of the object over the time interval?

117. ## physics

a person riding a bicycle whose wheels have an angular velocity of 20 rad/s. The brakes are applied, and the bike is brought to a stop through a uniform acceleration. During braking, the angular displacement of each wheel is 15.92 revolutions. How long

118. ## Physical Science

Why is metal shiny? A. The electrons absorb each light wave. B. The loose electrons reflect most wavelengths of light. C. The electrons emit light due to electronic excitation. D. The electrons transmit most wavelengths of light. (I think the answer is B,

119. ## calculus

can someone also help me ndertsand this question ; y=x^3 +2x^2+3 represents the rate of an object over the interval [7, 10]. What is the average rate of the object over the time interval?

120. ## Physical Science

If an element has a +1 positive charge and the following chemical symbol, how many electrons does it have? 17 on top, 6 on bottom, Oxygen (O) A. 7 B. 17 C. 5 D. 18

121. ## Physical Science

Like water, hydrogen fluoride, HF, and ammonia, NH3, have relatively high boiling points. Explain. A.The polar molecules of each of these materials have relatively strong attractions for themselves, which translates to relatively high boiling points. B.

122. ## English

I would like help to understand and find some poetic devices in this poem please. Some of the ones I have found are caesura and enjambment i believe. Enjambment seems to push her away from reality and caesura brings her back if I'm analyzing it right? Also

123. ## Math

The circumference is 3 inches and the length of tube is 16 inches. The string is wrapped around symmetrically around the tube. What is the length of the string?

124. ## Math/pre-algebra

A scale drawing has a scale of 1/4in.:6ft. Find the length on the drawing for each actual length. 12. 18ft 13. 66ft 14. 204ft

163. ## Math

A recipe calls for 2/3 cup of sugar for every 4 teaspoons of vanilla. What is the unit rate in teaspoons per cup? Explain your answer.

164. ## Pre calculus

explain how to do these with please. I was out a couple of days so give clear instructions. 1. sin(π/2-ϴ)secϴ 2. cot(π/2-ϴ)cosϴ

170. ## Chemistry

When heated, KClO3 decomposes into KCl and O2. If this reaction produced 79.9 g of KCl, how much O2 was produced (in grams)?

171. ## Precalculus

Compute the distance between the parallel lines given by $\begin{pmatrix} 1 \\ 4 \end{pmatrix} + t \begin{pmatrix} 4 \\ 3 \end{pmatrix}$ and $\begin{pmatrix} -5 \\ 6 \end{pmatrix} + s \begin{pmatrix} 4 \\ 3 \end{pmatrix}.$

172. ## algebra

The length of a rectangle is 4 inches more than twice the width. If the area of the rectangle is 48 square inches, what is the length of the rectangle? SHOW WORK. Thank you!!

6. The constitutional prohibition against laws respecting an establishment of religion must at least mean that, in this country, it is no part of the business of government to compose official prayers for any group of the American people to recite as part

174. ## Social studies

Which of the following as a consequence of the second industrial revolution? A. Disease size quickly due to poor medical care. B. New sewer systems decreased death rate. C. Skyscrapers caused air pollution. D. Protests increased due to narrow. Is the