1. Algebra - help

A biologist studied the populations of common guppies and Endler’s guppies over a 6-year period. The biologist modeled the populations, in tens of thousands, with the following polynomials where x is time, in years. common guppies: 3.1x2 + 6x + 0.3

2. Algebra word problem

A family is building a rectangular patio in their backyard. The rectangular yard has dimensions of (8x+2) by (6x + 3) and they are planning the patio to be (x + 5) by (3x + 1). What is the area of the remaining yard after the patio has been built?

3. Math

3. A textbook weighs 2.5 pounds. How many kilograms does the textbook weigh? Round your answer to the nearest tenth of a pound. 1kg = 2.2 lb 1.1 kg 1.8 kg 5.5 kg 4.7 kg (my answer) 5. Solve the proportion using cross products 18/20 = k/110 A. 99 B. 122 C.

4. physical

an airplane takes off at an angle of 30 to the horizontal. if the component of its velocity along the horizontal is 250 km/h , what is its actual velocity? also find the vertical component.

5. Algebra word problem

The area of a rectangular garden is given by the trinomial x2 + 6x – 27. What are the possible dimensions of the rectangle? Use factoring.

6. Algebra

A sports team is building a new stadium on a rectangular lot of land. If the lot measures 6x by 10x and the sports field will be 1x by 4x, how much of the lot will be left over to build bleachers on?

7. Math

Adrian jogs 3/4 mile each morning. How many days will it take him to jog 3 miles?

8. calculus

A searchlight rotates at a rate of 3 revolutions per minute. The beam hits a wall located 7 miles away and produces a dot of light that moves horizontally along the wall. How fast (in miles per hour) is this dot moving when the angle \theta between the

9. Algebra

The area of a rectangular art studio is given by the trinomial 24x2 – 4x – 8. What are the possible dimensions of the studio? Use factoring.

10. Math Geometry

Marisol is painting on a piece of canvas that has an area of 180 square inches. The length of the Painting is 1 1/4 times the width. What are the dimensions of the painting this is for elementary school so make it simple

Use implicit differentiation to find the points where the parabola defined by x^{2}-2xy+y^{2}-6x+2y+17 = 0 has horizontal and vertical tangent lines. List your answers as points in the form (a,b).

12. physics

Two forces, 1 = (3.85 − 2.85) N and 2 = (2.95 − 3.65) N, act on a particle of mass 2.10 kg that is initially at rest at coordinates (−2.30 m, −3.60 m). (a) What are the components of the particle's velocity at t = 11.8 s? = m/s (b) In what

13. Math

Shirley is on a Ferris wheel which spins at the rate of 3.6 revolutions per minute. The wheel has a radius of 35 feet, and the center of the wheel is 51 feet above the ground. After the wheel starts moving, Shirley takes 12 seconds to reach the top of the

14. Physics

A small cork with an excess charge of +6.0 μC (1 μC = 10^-6 C) is placed 0.12 m from another cork, which carries a charge of -4.3 μC. a. What is the magnitude of the electric force between the corks? b. Is this force attractive or repulsive? c. How many

15. Algebra word problem

A family is having a pool built in their backyard. If their yard is rectangular and measures 7x by 6x and the pool is circular with a radius of 2x how much of the yard will be left over after the pool is built?

16. Algebra

A biologist studied the populations of common guppies and Endler’s guppies over a 6-year period. The biologist modeled the populations, in tens of thousands, with the following polynomials where x is time, in years. common guppies: 3.1x2 + 6x + 0.3

17. calculus

A man of height 1.5 meters walk away from a 5-meter lamppost at a speed of 1.8 m/s. Find the rate at which his shadow is increasing in length.

18. Calculus

for what values of r does the function y=e^rx satisfy the differential equation y''-4y'+y=0 Show steps please! Thank you!

19. English

____is used to inspire an audience? Answers are Tone Pace Repetition Imagery I think it is imagery thanks

20. Algebra

which of the following is true bout a trend line for data? a- the minimum data point always lie on the trend line b- every data point must lie on the trend line c- the trend line describes the pattern in the data if one exists d- the trend line includes

21. Science- still waiting

Give 2 examples for each state of fresh water: a) solid b)liquid c) vapour?

22. Algebra

A sphere has a radius of 4x + 1. Which polynomial in standard form best describes the total surface area of the sphere? Use the formula S = 4(pi)r2 for the surface area of a sphere.

23. Science

Give 2 examples for each state of fresh water: a) solid b)liquid c) vapour?

24. Algebra

The area of a rectangular table is given by the trinomial x2 + 7x – 30. What are the possible dimensions of the rectangle? Use factoring.

25. Science

provide three statements that demonstrate the importance of units when describing motion.

26. Math

Find the first four terms of the sequence represented by the expression. 3n + 5 A.5,8,11,14 B.8,11,14,17 C.3,6,9,12 D.0,8,11,14

27. Science

provide three statements that demonstrate the importance of units when describing motion.

28. Algebra

A community group is building a playground on a rectangular lot of land. The lot measures 6x by 9x and they want to cut out an area for a circular jungle gym with a radius of 4x. How much of the land will be left over after the jungle gym is built?

29. Criminal justice

1. Though both emphasize consequences, utilitarianism differs from ethical egoism in that: A. utilitarianism emphasizes consequences for all people affected. B. egoism emphasizes happiness, whereas utilitarianism emphasizes welfare. C. egoism defines

30. Physics

After a 0.200-kg rubber ball is dropped from a height of 1.95 m, it bounces off a concrete floor and rebounds to a height of 1.45 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. (b) Estimate the time the ball

31. Trig

A guy wire attached to the top of an electric pole makes a 70deg angle with the level ground. At a point 25 feet from the guy wire (farther away from the pole), the angel of elevation to the top of the pole is 42deg. How long is the guy wire?

c) Estimate the instantaneous rate of growth in 2006 by measuring the slope of the tangent line through (2005, 10237) and (2007, 15005). d) Estimate the instantaneous rate of growth in 2007 by measuring the slope of the tangent line through (2006, 12435)

33. English

Why does Allen Ginsberg Refer to Walt Whitman as dear father in his poem A Supermarket in California? Answers are He considers Whitman to be a leader in a her native poetry He considers Whitman wisdom as a poet to be similar to that of a wise paternal

34. Probability

Alice has five coins in a bag: two coins are normal (i.e., fair with one face Heads and the other face Tails), two are double-headed (i.e., both sides are Heads), and the last one is double-tailed (i.e., both sides are Tails). She reaches into the bag and

provide three statements that demonstrate the importance of units when describing motion.

36. Physics

Know matter how i work it out, i keep getting the wrong answers. please help!!! i only have two more submissions before it closes on me. A sample of blood is placed in a centrifuge of radius 14.0 cm. The mass of a red blood cell is 3.0 x 10^-16 kg, and the

37. Criminal justice

1. Which of the following, according to Carl Klockars, is NOT an important consideration in determining whether the good ends of police work justify immoral means in a given scenario? A. Are there other, non-dirty, means that may be effective but that we

38. S.S.

Because many Southerners were unwilling to sell slaves to raise funds to build factories, they had no money to invest in businesses. Another name for this type of money is a. stocks b. bonds c. capital* d. business means

39. calculus

A conical tank has height 3 m and radius 2 m at the top. Water flows in at a rate of 1.4 \text{m}^3\text{/min}. How fast is the water level rising when it is 2.6 m?

40. calculus

A hot air balloon rising vertically is tracked by an observer located 4 miles from the lift-off point. At a certain moment, the angle between the observer's line-of-sight and the horizontal is \frac{\pi}{3} , and it is changing at a rate of 0.1 rad/min.

41. Physics

Know matter how i work it out, i keep getting the wrong answers. please help!!! i only have two more submissions before it closes on me. A sample of blood is placed in a centrifuge of radius 14.0 cm. The mass of a red blood cell is 3.0 ✕ 10−16 kg, and

42. English

What order would you be using if you were an AABB pattern? answers are. Chronological Spatial Compare -and-Contrast Developmental Thanks

43. chem

How would you prepare 100 mL of a 0.01N sulfuric acid solution?

44. Probability

To get a complete collection of stamps, Ann needs to have 5 specific (and different) kinds of stamps, denoted by k1,…,k5. She starts out with no stamps. She then receives 5 stamps randomly from a lottery. Each of these 5 stamps has probability 1/5 of

45. U.S History

Imagine you are one of the factory workers at Lowell Mills tasked with creating the headline story for this month’s factory newspaper. Factory Workers—Factory Worker Template 1. First paragraph: Hook your reader into wanting to read your article.

46. PHYSICS

A frictionless horizontal air track has a spring at either end. The spring on the left has a spring constant of 1600 N/m; the one on the right has a spring constant of 1060 N/m. A glider with a mass of 2.9 kg is pressed against the left-hand spring,

47. Science

A ball of mass 200 g is dropped from a height 3 m above the ground onto a hard floor, and rebounds to a height of 2.2 m. If the ball is in contact with the floor for 0.002 s calculate the average force exerted by the floor on the ball

48. physics

the cheetah is is one of the fastest accelerating animals, for it can go from rest to 34.5 m/s in 5.00 seconds. if its mass is 106 kg, determine the average powee developes by the cheetah during the acceleration phase of its motion

49. Chemistry

1.600g of a metallic oxide of type MO were dissolved in100mL 1.0M HCl. The resulting liquid was made up to 500mL with distilled water. 25.00mL of the solution ,then required 21.02mL of 0.1020 M of NaOH for neutralization. Calculate the mass of the oxide

50. Criminal justice

1. Which of the following principles approves or disapproves of an action according to its tendency to promote happiness for the greatest number of people? A. Altruism B. Utility C. Hedonism D. Egoism im confused between B and C 2. Which of the following

51. English

The elements of persuasion are? Answers are Pace,volume,tone,repetition,action Pace,volume,tone,repetition,imagery Action,words,facial,expression,tone None of the above I think it is the second one thanks

52. Algebra

Chris can be paid one of two ways. Plan A is a salary of $420 per month, plus a commission of 7% of sales. Plan B is a salary of$552 per month, plus a commission of 4% of sales. For what amount of sales is Chris better off selecting plan A? Chris should

53. physics

A small block of mass 42 kg slides along a frictionless loop-the-loop track. The radius of the loop is 5 meters. At what height above the bottom of the track should the block be released from so that it just makes it through the loop-the-loop without

54. Social Studies

Can you please give me 2 examples of manifest destiny in the Treaty of Guadalupe Hidalgo? Thanks!

55. Pre-Algebra

How do you find the surface area of cones and cylinders?

56. Math Geometry

Marisol is painting on a piece of canvas that has an area of 180 square inches. The length of the Painting is 1 1/4 times the width. What are the dimensions of the painting

57. College Chemistry

Please help me. I have worked on this for 2 days. I don't understand the ratio of this equation.4Na+O2 to 2Na2O. for question: How many grams of Na2O are produced when 81.ograms of Na reacts?

58. Math

Bob spends 3/8 of his pocket money on food and 1/3 of it on a present for his sister. What is the fraction of his pocket money remains? I need some help on this!

59. chemistry

Hey Guys so I have this problem with ICE tables that is extremely confusing for me so I would love some help on it! At a Certain Temperature, the equilibrium constant for the reaction of NO with Cl2 is 6250. If the initial concentration of NOCl is 1.0M and

60. social studies

Under Andrew Johnson's plan for reconstruction what did the southern states have to do to be readmitted to the union ? a) They had to ratify the twelfth amendment b)They had to ratify the amendment thirteenth amendment c)

61. American National Government

For Max Weber, the bureaucracy was the highest form of rationality because (Points : 1) bureaucrats would become cogs in the wheel. it was impersonal. it was personal. it was ordered by impartial rules or laws.

Need help with this problem. Suppose you arrange 48 counters into groups. The first group has 3 counters. Each group after that has 2 more counters than the group before. How many groups do you need to make to use all 48 counters?

63. Probability

Consider the following joint PMF of the random variables X and Y: pX,Y(x,y)={1/72⋅(x2+y2),if x∈{1,2,4} and y∈{1,3}, 0, otherwise}. 1. P(Y

64. math

the levels of swimming pool in red from 4.5 to 6 feet. what is the percent increase in the water level rounded to the nearest tenth of a percent

65. Stats

4. A least squares regression line to predict a student’s Stat145 test score (from 0-to-100) from the number of hours studied was determined from a class of 55 Stat145 students: ̂ = 48.2 + 2.21x. One student in the class studied for 18 hours and scored

66. statistics

a large shipment of computer chips, of which 5% are actually defective, a quality control manager decides to test chips until he finds the first defective. What is the probability that the manager finds the first defective chip on the first test? in

67. physics

A bartender slides a glass mug with a mass of 520 g along the top of a level bar. The coefficient of kinetic friction between the glass and the bar is 0.09. When the glass leaves the bartender's hand, it is moving, it is moving at a speed of 3.9 m/s. How

68. social studies

Who was the first Louisiana governor elected under the Constitution of 1867 ? a) Henry Watkins Allen b) Oscar Dunn c) Michael Hanh d) Henry Clay Warmoth

Consider the function f(x)=4sqrt(x)+4 on the interval [2,5] . Find the average or mean slope of the function on this interval _______

70. pre-algrebra

melind wants to paint the exterior lateral surface of her house. It is nine feet high and has a perimeter of 140 feet. each gallon of paint covers 300 square feet how many one gallon cans of paint does she need to buy to paint her house

71. Intro to Geography

A prime minister is the leader of what type of region? A.)Climate B.)Cultural C.)Economic D.)Political Cultural or political? I think it's cultural idk though HELP please :)

72. math

11. A Certification Exam containing 20 true and false questions. If a student guesses at the answer to each question, what is the probability that she/he will get exactly 14 correct?

73. Math

Determine the minimum number of students with scores of 90 required to have the class average over 75. Score 60,70,80,90. Number of students 7, 3, 8, ?

74. math(QUESTION)

Suzan has a 69 as her grade in a class. If she does a quiz worth 9% of her grade what will her grade be?

please check me Consider the characters Doc rabbit,Bruh fox,and tar baby.Which do you think is a real hero? A.Doc rabbit is a real hero because he is smart and knows how to get out of work B.toad is a real hero because he uses his brains to outwit a

76. travel

a train travel 70 feet in 1/10 seconds at the same speed how many feet will it travel in 3 /12 seconds?

77. Calc :(((((

The curve y = x/(1 + x^2)is called a serpentine. Find an equation of the tangent line to this curve at the point (4, 0.24). Round the slope and y-intercept to two decimal places.)

78. physics

You must show your work for full credit.) Calculate the circular speed of an object that orbits the Sun at a distance of 0.2 AU (1 AU = 1.5e+11 meters, the distance between the Earth and the Sun)

79. English

The are of persuasion is using words to influence the__and actions of others? Answers are Words Minds Opinions Engagement I think it is Opinions

80. Math

an ice cream parlor is giving away free icecream sundaes on opening day. the sundaes are assembled randomly from 7 types of ice cream, 2 types of sauce, and 5 kinds of toppings. find the probabilty.

81. statistics

In a random sample of 100 customers, 62 returned with a month. For a 95% confidence interval on the proportion of customers who return for an oil change, the lower limit is:

82. Calculus Help

Find a parabola with equation y = ax^2 + bx + c that has slope 6 at x = 1, slope −14 at x = −1, and passes through the point (2, 17).

83. Physics

A 39.7-kg crate rests on a horizontal floor, and a 65.3-kg person is standing on the crate. Determine the magnitude of the normal force that (a) the floor exerts on the crate and (b) the crate exerts on the person.

84. psycology

______________classifies people in stable, systematic ways. Answer a. The trait-dispositional level. b. Projective tests. c. The Big-Five. d. A and C. e. All of the above. my answers is E

85. Georgia State History

Why is the issue important to you? If you were a muckraker, would you want to expose, uncover, or examine the issue? Do you feel that issue still exists today, perhaps in a different form?

86. Science- help asap plz

think about the role that trees play in the water cycle. what are two of the ways in which they are part of the cycle?

87. ecology

What is a recent technological development that they use to learn more about the endangered tiger quoll?

88. chemistry

If a gaseous mixture is made of 2.37 g of He and 2.73 g of Ne in an evacuated 1.19 L container at 25°C, what will be the partial pressure of each gas and the total pressure in the container?

89. CHEMISTRY

When 6.724 g of one of the hydrates of sodium sulfate (Na2SO4) was heated to drive off its water of hydration, the residue of anhydrous sodium sulfate has a mass of 2.964 g. What is the value of x in the formula for the hydrate, Na2SO4•xH2O?

90. Algebra

You are taking a science course in which there will be four tests, each worth 100 points. You have scores of 94,100, and 92 on the first three tests. You must make a total of 360 in order to get an A. What scores on the last test will give you an A? The

Would French 1 be a good course to take in 9th grade?

92. MATH :D

Mrs. Wilkerson noticed that her in-laws’ birth dates have an unusual property. Her mother-in-law was born 5-31-36, and her father-in-law was born 9-25-34. Furthermore, her hus- band’s grandfather was born 7-7-14. How many birth dates in a century have

93. physical science

An airplane trvels with a velocity of 200 mi/h in a direction 30 deg. west of north of 1.50 h. How far north and how far west is it from its starting point?

94. Science

Two identical twins marry two identical twins. Will their offspring look the same?

95. Probability

We start with a collection of n (distinguishable) individuals whom we want to split into three possible teams: the blue team, the red team, and the white team. Each individual is randomly assigned to exactly one of the teams according to the following

96. psychology

______________classifies people in stable, systematic ways. Answer a. The trait-dispositional level. b. Projective tests. c. The Big-Five. d. A and C. e. All of the above. my answers is E

97. social studies

What did the national government agreed to do to ensure the election of Rutherford B. Hayes ? a) remove federal troops from the south b) put restrictions on the voting rights of blacks c) provide tax money to rebuild the south after the war d) send troops

99. English

The old stone bridge across Rugen Bay is one of my favorite places to play. I toss pebbles for Mom, and a pebble for Dad, And a rock for horses and chickens we had. I watch as each of the stones makes rings like songs that each of memories sings. For my

100. Algebra Question

When I'm factoring ax^2 + bx + c, is it fine to switch signs in the factoring answer? For example: Can (2x - 5)(3x + 5) become (2x + 5)(3x - 5)?

101. mathematics.

if h=4r what is the ratio of r:h.

102. Anatomy and Physiology

A woman who recently came home from a tropical vacation now has abdominal pain and diarrhea. Her blood test results show an elevated eosinophil level. Which organism is most likely the cause of her illness? A. Bacteria B. Virus C. Fungus D. Parasite I got

103. Science

Where are you likely to observe the tiger quolls in there habitat?

104. science

find the empirical formula for a compound that consists of aluminum and chlorine in which the aluminum is 20.2% by mass

f(x) -2x^3+2x^2-3x+2 Find the average slope of this function on the interval (–3–1) ________

106. Chemistry

A 3.68 g sample of solid gold is heated from 24 ºC to 34 ºC. How much energy (in joules and calories) is required? Thank you!

107. Math Time

From 1:30pm-2:15pm Is 75 minutes? I added 60 plus 15 If I'm wrong, please explain

108. Education

What is the difference between "knowing that" and "knowing how"?

109. english

Can anyone give me some quotes which i could use for writing a para describing the story 'the model millionaire'?

110. english

Can anyone give me some quotes for writing a para about 9/11?

111. english

Can anyone give me some quotes for writing a para about water scarcity

112. English

What are the major themes of 1984

113. english

Grammar and word usage Is it correct? * I always utilized ACT Sparknotes as a source * The students were interested to learn.

114. Criminal Justice

Question: Criminal investigation is a/an ________ and ________ series of activities designed to use various pieces of information and evidence to explain the events surrounding a crime. Identify a suspect, and link that suspect to a particular crime or

115. Chemistry

2 NO(g) + O2 (g) 2 NO2 (g) Given that Kp=7.96×1012 for the reaction above and the following starting conditions: Initial Concentrations p(NO)=0.775 atm p(NO2)=0.000 atm p(O2)=0.789 atm Determine the equilibrium concentration of NO2.

116. physics

Ricky, the 5.8 kg snowboarding raccoon, is on his snowboard atop a frictionless ice-covered quarter-pipe with radius 9 meters. If he starts from rest at the top of the quarter-pipe, what is his speed at the bottom of the quarter-pipe? Use SI units in your

117. maths

find the probability of scoring a sum 11 when a die is thrown twice.

118. Math

. If 111 → 13, 112 → 24, 114 → 46, and 115 → 57, complete the statement: 117 → ______. Explain how you got your answer in one or more complete sentences.

119. Language Arts

7) While I was researching skate boards, I found an interesting old newspaper story. 8) In the June 29, 1999 edition of the Mercury, there was an article on skateboarding. 9) Some scientists in San Francisco, California filmed skateboarders in action. 10)

120. science

why is gravity on earth and not on the moon i need something to help me start it off

121. maths

if sin A = 3/5 and cos A is less than 0,determine the value of sin (-A)

122. stress

The shear stress in a plane normal of which makes an angle of 30 degree with the direction of maximum principal stress will be ?

123. S.S.

Which of the following was NOT a reason why there was less industrial development I the South than in the North? a. because of the rockiness of southern land made it difficult to develop railroads. b. because there was a lack of capital in the South. c.

124. Statistics

Help please... What are some reason for conducting an experiment with two factors?

125. Algebra 1 Answer Check (Reiny)

Factor each trinomial. 1. x^2 + 6x + 5 A: (x + 1)(x +5) 2. x^2 - 7x - 12 A: (x - 3)(x - 4) Solve each system by substitution. 3. 2x - y = 1; x - y = -2 A: (3, 5)

126. western civilization

what was Frederick the great's attributes? what was Frederick the great's reforms?

--- Find the slope m of the tangent to the curve y = 4 + 4x^2 − 2x^3 at the point where x = a. ---- Find equations of the tangent lines at the points (1,6) and (2,4). (1,6) Y(x)= (2,4) Y(x)=

128. Social Studies

Need help figuring out what 3 parts they are talking about in the question: List the 3 parts of the Containment Policy. Thanks...

129. math

can someone help me and expalin how to do these five question please and thank you 11. y = ½ x2 +2x – 3 27. 3x2 – 5x = -3x2 + 6 33. x2 + 10x = -8 45. x2 – 6x + 9 = 0 47. (-3,0),(1,4),(-1,6),(2,0)

130. Anatomy and Physiology

A patient is diagnosed with anemia. Which manifestation would this patient demonstrate? A. Palpitations B. Yellow skin color C. Fatigue D. Leg cramps My answer is A

131. math

i need some help please 2x^2 +5-3

132. math

im stuck on this problem can some one please explain.. y=9(7+4)^2+9

133. MATH

HELP PLEASE y = 3x2 + 2x – 1

134. social studies

what was Abraham Lincoln view of secession ? a) he thought it was morally wrong b) he thought it was unconstitutional c) he thought most southerners did not support it d) he thought it was a solution to the problems of the country

135. math

Water is flowing at the rate of 15km/hr. Through a cylindrical pipe of radius 7cm into a rectangular tank which is 50m long and 44m wide.In how many hours will the water label in the tank raised by 21cm

136. social studies

why did Bantu peoples keep moving to new areas ?

137. Chemistry

A 2.6 g of a substance that looks like gold needed 9.4 J of heat energy to raise its temperature from 20 to 38 ºC. Is the metal pure gold?

138. chemistry

Given the following sets of values for three of the gas variables, calculate the unknown. P = ? mm Hg; V = 26.0 mL; n = 0.007826 mol; T = 15.6°C

139. Math Time

1:30pm - 2:30pm Is 110 minutes, correct? If not, how many minutes is it?

140. English

The poem “The Negro Speaks of Rivers” was written from what experience? a. Hughes’ move to New York. c. Hughes read about the experiences of slaves. b. A trip he made to a famous river. d. A trip he made to live with his father in Mexico City for a

141. biology

mention some tests for enzyme?

142. CHEMISTRY

A lawn fertilizer is rated as 6.50% nitrogen, meaning 6.50 g of N in 100 g of fertilizer. The nitrogen is present in the form of urea, (NH2)2CO. How many grams of urea are present in 100 g of the fertilizer to supply the rated amount of nitrogen?

143. math

need help! solve for y 7y^2-52y-32=0