# find the derivative of y=(3x+1)^2 y= square root 13x^2-5x+8

97,722 questions, page 656
1. ## math

Three coins are selected from 10 coins: 4 dimes, 4 nickels, and 2 quarters. In how many possible ways can the selection be made so that the value of the coins is at least 25 cents? I know that the total outcomes equals 120, but how do I find how many of

asked by Zoe on February 21, 2009
2. ## physics

In her physics lab, Jessica rolls a 11-g marble down a ramp and off the table with a horizontal velocity of 1.38 m/s. The marble falls in a cup placed 0.45 m from the table's edge. Find the table's height.

asked by ronnie on February 6, 2013
3. ## Scince

A person is standing on 60m height per hour he throw one ball upwards with u=10m/s then find when the ball reach ground and velocity with which the ball strikes the ground

asked by Sanvi on October 15, 2016
4. ## math

a person was climbing on a building. He slips 1 m for every 5 metre he climbs up. If the building is 53 m high and he takes 5 seconds to climb 1 metre find the total time taken by him to get on the top of the building.

asked by Anonymous on April 25, 2014
5. ## Calculus

The position function of a particle in rectilinear motion is given by s(t) s(t) = t^3 - 9t^2 + 24t + 1 for t ≥ 0. Find the position and acceleration of the particle at the instant the when the particle reverses direction. Include units in your answer.

asked by Tom on May 18, 2015
6. ## Math

The diagram shows a solid metal cylinder. The cylinder has base radius 2x and height 9x. E cylinder is melted down and made into a sphere of radius r. Find the expression for r in terms of x.

asked by Eleanor on November 17, 2012
7. ## Math (urgent)

the equation x^2+y^=25 describes a circle with center at the origin and radius 5. The line y=x-1 passes through the circle. Using the substitution method, find the points at which the circle and line intersect. a) (4,3) and (-4,-3) b) (3,4) and (-3,-4) c)

asked by Max on September 7, 2016
8. ## Math

The volume of a triangular prism is 12cubic cm .atriangular face has base b and height h. The length of the prism is l. Find possible values for b, h and l. Sketch one possible prism that has an isosceles triangle as its base.

asked by Jalal on November 7, 2015
9. ## distance problem

A car travels 20 km/h faster than a truck. The car covers 360 km in 3 hours less time than the truck.Find the speed of the truck. (kindly write the solution, thanks alot)

asked by HELP HELP MNHS on December 17, 2012
10. ## Trig

The length of a rectangle is 142.9 in. If the diagonal makes an angle of 32.1o with this side, find the measure of the diagonal of the rectangle rounded to the nearest tenth of an inch. let x represent the diagonal.

asked by Anthony on May 3, 2017
11. ## Geometry

Help! I don't understand this problem Find the angle of rotation that maps point P (1,0) on to P'. What are the x and y coordinates of point P' to the nearest thousandths? Determine a translation rule that maps point P onto P'.

asked by Kelly on August 22, 2015
12. ## College Physics

Find (a) the magnitude and (b) the direction of the net force on an object given that the following forces act on the object at the same time: 10N east, 20N down, 20N west, 30N down, and 20N up.

asked by Nicole on February 6, 2015
13. ## algebra

Given the following function, find: (a) vertex (b) axis of symmetry (c) intercepts, (d) domain (e) range (f) intervals where the function is increasing, (g) intervals where the function is decreasing Please show all of your work f(x)=-7x^2-14x-3

asked by sarah on January 18, 2012
14. ## math

the sides of a polygon have lengths of 2cm,5cm,6cm,4cm,9cm and the perimeter of a smaller polygon is 78cm Find the length of the sides of the larger polygon

asked by the game on January 25, 2012
15. ## Algebra 2

Find an equation of the ellipse satisfying the given conditions. Center at (-2,3) with major axis of length 8 and parallel to the y axis, minor axis of length 2. I don't understand how you get the formula for this. some help please

asked by Anonymous on April 5, 2012
16. ## college algebra

Given the following quadratic equation, find a. the vertex b. the axis of symmetry c. the intercepts d. the domain e. the range f. the interval where the function is increasing, and g. the interval where the function is decreasing h. Graph the function.

asked by LISSETT on December 16, 2012
17. ## maths

a mathematics question contained 20 items. every wrong answer scores -2marks, every correct answer scores 4marks and no mark for no answer. find the maximum possible score

asked by Elijah on November 18, 2015
18. ## algerbra

Katy has a rectangle field that is 700 feet wide one portion of the field is 2x long the other portion is 14y. Use the distributive property to find an expression for the area of the field.

asked by pat on December 9, 2012
19. ## PHYSICS

During a play, a tennis player hits the ball when its velocity is 20 m/s towards him. The racquet exerts a force of 540N on the ball for 6.90 ms, giving its returning velocity of 42 m/s. Find the mass of the ball

asked by Hep on December 19, 2012
20. ## physics

The force required to stretch a Hooke’s-law spring varies from 0 N to 68.1 N as we stretch the spring by moving one end 16.2 cm from its unstressed position. Find the work done in stretching the spring

asked by james on December 20, 2012
21. ## mathematics

Discuss the equation 2x^2-y^2+4x+4y-4=0 centrr, transverse axis, vertices foci TWo point s equation of asymptope x=2cost y=3cost 0 is less than or equal to t and t is less than or equal to pi. Find rectangular equation

asked by matt on July 9, 2014
22. ## Math

John's car is 13 feet long. He is making a model that is 1/12 of the actual size. Which proportion below should be used to find the length, L, of the model? A(wrong) 13/L = 1/12 B(correct) L/13 = 1/12 C(wrong) L/13 = 1/L D(wrong) 12/L = 13/1 I don't get

asked by Sarah on February 28, 2010
23. ## TRIG

The length of a rectangle is 142.9 in. If the diagonal makes an angle of 32.1o with this side, find the measure of the diagonal of the rectangle rounded to the nearest tenth of an inch. let x represent the diagonal.

asked by Tony on May 2, 2017
24. ## Science

Can someone please help me with this problem? A 200-1b block rests on a horizontal plane. Find the magnitude of the force P required to give the block an acceleration of 10 ft/s2 to the right. The coefficient of friction between the block and the plane is

asked by Latoya on November 8, 2015
25. ## math

The base of a rectangular prism has a length of 13 inches and a width of 1/2 inch. The volume of the prism is less than 65 cubic inches. Find all possible heights of the prism. Show all your work as an inequality. THANK YOU!!

asked by kimie on November 8, 2015
26. ## Pyhsics

The weight of the atmosphere above 1 m2{\rm m}^{2} of Earth's surface is about 100,000 N{\rm N}. Density, of course, becomes less with altitude. But suppose the density of air were a constant 1.2 kg/m3{\rm kg}/{\rm m}^{3}. Calculate where the top of the

asked by Kimmie on April 10, 2014
27. ## algebra

A motorboat that travels with a speed of 20 km/hour in still water has traveled 20 km against the current and 180 km with the current, having spent 8 hours on the entire trip. Find the speed of the current of the river.

asked by Anonymous on March 30, 2018
28. ## Chemistry

Use Ksp to find the concentration of an ion in a saturated solution. Consider a 2.50E-3 M solution of Al2(SO4)3. (a) What [OH^-] is required to initiate precipitation of Al^3+ from the solution? (b) What [OH^-] is required to lower the [Al^3+] to 2.00E-7 M

asked by Jo on July 28, 2012
29. ## math

A company car is purchased for Rs 23580 and is expected to be driven 95000 miles before being sold.The expected salvage value for the car is Rs 2300.Find the unit depreciation for the car.

30. ## chemisty

find the oxidation state of a carbon in methane, carbon monoxide, carbon dioxide, CH2O, acetic acid, carbonic acid, methanol, and benzene (C6H6)

asked by Allison on March 10, 2015
31. ## Math

Given the total profit function P(x) = 1.3x-.01x^2-30, let x represent a number of days and find maximum profit achieved and when that profit is made. Then graph the function and mark the vertex

asked by Anonymous on April 15, 2014
32. ## physics

An artificial satellite circling the Earth completes each orbit in 139 minutes. (The radius of the Earth is 6.38 106 m. The mass of the Earth is 5.98 1024 kg.) (a) Find the altitude of the satellite.

asked by Anonymous on October 31, 2011
33. ## Physics

Two point charges of 8.7×10−6 C, on the left, and −2.7×10−6 C, directly to its right, are separated by 0.071 m. Find the electrostatic force acting on the charge on the left. A force to the right is taken as positive, while one directed to the left

asked by Anonymous on February 3, 2014
34. ## math

the smith family plans to sit down to thanksgiving diiner at 6:00 P.M. they have an 18 pound turkey.the turkey needs to cook about 20 minutes per pound. at what time should the turkey go in the oven? 2:40? how do you find the answer?

asked by Celest on June 5, 2012

State Bank made a loan at 12% interest for 360 days. If the amount of interest was $934.20, use the ordinary interest method to find the amount of principal borrowed. asked by Richard Zimmerman on June 15, 2017 36. ## C programming A few questions, all involving "for" loops that I am unsure how to do (Thank you in advance for the help): Q1.) Write a table of conversions from Celsius to Rankin. Allow the user to enter the starting temperature and increment between lines. Print 25 asked by Randy on October 18, 2010 37. ## English Thank you for your last corrections. Here are some more sentences for you to check. 1) He suggests he should get (not make) a loan from a moneylender. 2)He should ask Shylock for the money. 3) The man who wants to marry her should do (perform??) a precise asked by Franco on October 8, 2010 38. ## IT 210 Pseudocode (Help needed ASAP) I was wondering if anyone would be able to help me with the following pseudocode so that it looks good to turn in. Any changes would be helpful. Completing Homework Main Module Declare FindReading As Real Declare ReadReading AS Real Declare asked by Jen on August 10, 2008 39. ## college chem a first order reaction has a fifth life of 20 seconds ( the amount of time needed to use up 1/5) a) Prove that the reaction has a constant 1/5 life. b) find the half life. asked by hymie on February 21, 2010 40. ## Physics Find the work that should be done to increase the distance between two point charges with the charges of 5nC and -10nC by 5cm. The initial distance between the charges is 15cm. asked by Macy on February 2, 2015 41. ## Physics A 65kg box is sitting on a level surface, and a 208N force is pulling on the box to the right. find both the normal force and acceleration of the box asked by Chad on July 7, 2012 42. ## math Two cars 288 km apart start at the same time moving towards each other and meet after 12 hours. If the speed of 1 car is 5 km\h faster than the other car, find the speed of each car. asked by trishayy0028 on December 10, 2015 43. ## science A ball is dropping from the roof and the window of 3m where a boy observe ball cross window in 0.5sec find the distance of wall above the window asked by Jagrati on September 14, 2016 44. ## math aiden knows the length of only one side of his garden. He says he will be able to find the area knowing only one side. Explain how this can be true. If there's only one side then Aiden should multiple it...? But if so, how many times 2, 3, 4...? asked by Evelyn on October 8, 2015 45. ## Calculus A rectangle in the first quadrant has one vertex as the origin, and other vertex on the curve y= -x^2 -2x +4. If the rectangle has one side lying on the x-axis, find the largest possible area of the rectangle. asked by Megan on May 5, 2013 46. ## math 100=1.5(1.1^n - 1)/1.1-1 Could you be so nice please and help me find the solution. The answer is 22 but I have whole time different number. I use log on both sides : 100=1.5(1.1^n - 1)/1.1-1 10 = 1.5(1.1^n - 1) 10 = 1.65^n - 0.5) log 10.5 = n log 1.65 n = asked by Lucas on February 23, 2014 47. ## MATH A population of insects increases at a rate of 250 + 16t +0.3t^2 insects per day. Find the insect population after 3 days, assuming that there are 40 insects at t=0. asked by Anonymous on November 18, 2007 48. ## physics Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s. asked by jim on June 2, 2011 49. ## Math Find the width of the rectangle. ----------------------- = Perimeter=30 in. = = = W=Width =============== L=Length P=w and l=11 p=2l+2w 30=(2x11)+2w 30=22+2w (Think:if 2 x w=8, then w=___divided____ w=8 So the width is 8 inches. I don't know what the asked by BUB on April 20, 2015 50. ## algebra The points (1,2), (5,5),(1,6) are the vertices of a shaded triangle. a. Write a system of linear inequalities represented by the shaded triangle. b. Find the area of the triangle. asked by Caden on January 9, 2019 51. ## Calculus A rectangle in the first quadrant has one vertex as the origin, and other vertex on the curve y= -x^2 -2x +4. If the rectangle has one side lying on the x-axis, find the largest possible area of the rectangle. asked by Megan on May 5, 2013 52. ## Math The radius r (cm) of a circle at time t seconds is given by r = 9t - t^3 . At each of the following instants, find the rate of change of the radius (w.r.t.'t') and state whether the radius is increasing or decreasing at these instants. a) t =1 b) t =2 c) t asked by Aaqib zaman on January 28, 2015 53. ## math He spent$48 on art supplies. The canvas for each of his paintings is an additional $2. He plans to sell his paintings for$10. Find the number of paintings (p) he will need to sell to break even.

asked by brandon on October 4, 2015
54. ## mechanics

A block of wood is pulled along a Horizontal table by a force of 33 N inclined at 30 degrees above the Horizontal.Find the vertical and horizontal components of the force.

asked by kia on June 28, 2017
55. ## PRe calc story problem!!

A radioactive element decays exponentially according to the function Q(t) = Q0ekt .If 100 mg of the element decays to 25 mg in 12 days, find the half-life of the element.

asked by Rania on March 10, 2017
56. ## pre calc

A radioactive element decays exponentially according to the function Q(t) = Q0ekt .If 100 mg of the element decays to 25 mg in 12 days, find the half-life of the element. please help

asked by Rania on March 10, 2017
57. ## elementary stats

On a multiple choice test with 11 questions, each question has four possible answers, one of which is correct. For students who guess at all answers, find the mean for the number of correct answers.

asked by Rose Bud on February 23, 2012
58. ## Algebra

The length of a pool is 3 feet more than twice its width. If the perimeter of the pool is 72 feet, find the dimensions of the pool by writing and solving a system of equations.

asked by EddieG on February 27, 2014
59. ## PHYSICS

An object of mass M is divided into two parts ,which are placed at distance d.if gravitational force of attraction is maximum between parts,then find the ratio of mass of both parts

asked by Tanya on April 3, 2015
60. ## physics

Anna pushes horizontally on a 57 kg penguin with force of 19 N, but the penguin does not budge. Find the force of static friction between the penguin’s feet and the ground.

asked by Anonymous on November 15, 2017
61. ## Physics

1. a force of 30n with a direction of 35 degrees northwest acts on point p. Find: a) the northward component on the force b) the westward component of the force

asked by Anonymous on June 21, 2011
62. ## chemistry

What weight of H2 at STP could be contained in a vessel that holds 4g of oxygen at STP? First, I used the Ideal Gas Law to find the volume of oxygen at STP, but im not sure what to do from there..

asked by CL on January 27, 2010
63. ## calculus

An open box is to be made. This box is to have a bottom and four sides, but no top. The box is to be made from paper that is 7" by 12". Maximize the volume and find the height.

asked by calculus on September 9, 2009
64. ## Derivatives Instantaneous rate of change

The electric field E at a distance r from a point field is E =K/r^2 where k is a constant. Find an expression for the instantaneous rate of change of the electric field with respect to r.

asked by Barry on June 3, 2015
65. ## math

100=1.5((1.1^(n) - 1))/1.1-1 Could you be so nice please and help me find the solution. The answer is 22 but I have whole time different number. I use log on both sides : 100=1.5((1.1^(n) - 1))/1.1-1 10 = 1.5(1.1^(n) - 1) 10 = 1.65^n - 0.5) log 10.5 = n

asked by Lucas on February 23, 2014
66. ## math

Mrs.penn has a circular tablecloth with a circumference of 29 feet. Which expression could be used ro find the radius of the tablecloth? f. 29 - 2 pie g. 29/2 pie h. 29/pie j 29 + 2pie

asked by dylan on December 6, 2010
67. ## Proofs and numbers

Compute empty(24). For each element of Z(intergers)=24 decide whether the element is a unit or a zero divisor. If the element is a unit, give its order and find its inverse.

asked by yin on November 28, 2012
68. ## Mechanics & hydromechanics

A block of wood is pulled along a Horizontal table by a force of 33 N inclined at 30 degrees above the Horizontal.Find the vertical and horizontal components of the force.

asked by joe on January 14, 2013
69. ## Math

Write a possible explicit rule for the nth term of the sequence, then use it to find the 20th term. 5, -10, 20, -40, 80, -160.... Ans: a(n) = 5(-2)^n - 1 20th term: -2621440

asked by Anonymous on June 2, 2015
70. ## maths

Find the roots of z^6 + 1 and hence resolve z^6 + 1into read quadratic factors; deduce that cos3x = 4[cos(x) -cos(pi/6)][(cos(x) -cos(pi/2)][(cos(x) -cos(5pi/6)]

asked by jake on November 10, 2008
71. ## Math

Building A is 40m high.The angle of depression of the top of Building B from the top of A is 26 degrees.if the two buildings are 10m apart,find the height of building B

asked by Deborah on March 12, 2017
72. ## maths

Find the roots of z^6 + 1 and hence resolve z^6 + 1into read quadratic factors; deduce that cos3x = 4[cos(x) -cos(pi/6)][(cos(x) -cos(pi/2)][(cos(x) -cos(5pi/6)]

asked by jake on November 10, 2008
73. ## College Algebra

The graph of a quadratic function f(x) is shown above. It has a vertex at (-2,4) and passes the point (0,2). Find the quadratic function y=a(x-(-2))^2+4 y=a(x+2)+4 2=a(x+2)+4 -4 -4 -2=a(0+2)/2 -1+ a function -1(x+2)+4 ? Im not sure where Im going wrong but

asked by Anonymous on June 12, 2014
74. ## Wayne community college

When a 0.101 kg mass is suspended at rest from a certain spring, the spring stretches 3.80 cm. Find the instantaneous acceleration of the mass when it is raised 5.90 cm, compressing the spring 2.10 cm.

asked by Joe on September 29, 2013
75. ## Math

A bag contains 3 blue marbles, 4 red marbles, and 2 white marbles. Three times you draw a marble and return it. Find the probability. P(all white)

asked by Justin on February 1, 2016
76. ## calculus

a particle moves along the x-axis in such a way that its acceleration at any time t is given by a(t)= 6t - 18. At time t = 0, the velocity v(t) = 24. and at time t = 1, the position x(t) = 20 i have to find the expression for the velocity and what values t

asked by allan on December 9, 2010
77. ## math

A cubical water tank has each edge 5m long. Find the volume of water in the tank if 1/5th of the tank is empty. Pls help... Urgent***

78. ## Algebra

The numberator of a fraction exceeds the denominator by 3. If 3 is added to the numerator and 3 is subtracted from the denominator, the resulting fraction is equal to 3/2. Find the original fraction.

asked by Brandon on August 11, 2011
79. ## maths

a ladder 10 m long just reaches the top of a vertical wall . if the ladder makes an angle of 60 degree with the wall , then find the height of wall .

asked by g.lingaraj on February 10, 2015
80. ## math

A ball is dropped from a height of 5 ft. Assuming that on each bounce the ball rebounds to one-third of its previous height, find the total distance travelled by the ball.

asked by Mike on December 6, 2010
81. ## physics

A water tank springs a leak. Find the speed of water emerging from the hole if the leak is 2.5 m below the surface of the water, which is open to the atmosphere.

asked by aok on December 7, 2010
82. ## Teacher Aide

Where would you most likely find a token economy as a form of classroom management? A} RRP B} Contract approach C} Contingency management approach D} RIP approach

asked by liana on March 23, 2010
83. ## Pre-Calculus

From a point on the ground 25 ft. from the foot of the tree, the angle of elevation of the top of the tree is 32 degrees. How do you find the height of the tree to the nearest foot?

asked by Joy on October 5, 2011
84. ## math

1. The 5th, 9thand16th terms of a linear sequence are consecutive terms of an exponential sequence GP. Find the common difference in terms of the first term

asked by Jeremiah on October 10, 2017
85. ## statistics

Women’s heights are normally distributed with a mean of 63.6 in and a sd of 2 .5in. The US Army requires women’s heights to be between 58 in and 80 in. Find the percentage of women meeting that height requirement.

asked by DezShonna K on June 11, 2010
86. ## Help me again in stats

Find the corresponding z-score to the given value and determine whether the value is unusual. A weight of 225 pounds among a population having a mean weight of 161 pounds and a standard deviation of 23.0 pounds.

asked by Joe on July 6, 2017
87. ## MATH HELP!!

Consider the three points A(2,3,1) B(1,-2,3) C(7,4,6) a) Show that ABC is a right triangle. b) Calculate the area of this triangle. c) Find the coordinates of the center of the circle circumscribed about triangle ABC

asked by Christine on September 28, 2016
88. ## Calc

I have an acceleration function and a velocity function that I know the equations for. How would I use those to find the equation for a position function x(t) if x(0) = 0? I'm just looking for a general method, but I can give the equations if needed.

asked by Kris on January 20, 2012
89. ## Math

I am doing Direct Variation in math. I don't understand how to do it. It would be very helpful if you helped me with these problems: Is each equation a direct Variation? If it is, find the constant of variation: y=3/5x -3x+2y=0 -5x+2y=9 8x+4y=12

asked by Kirsin on April 8, 2008
90. ## geometry

A farmer has a triangular field with sides that measure 120 yards, 170 yards, and 220 yards. Find the area of the field

asked by tori on February 16, 2012
91. ## Math

The radii of two spheres are 4ft and 8ft find the volume of a spheres whose surface area is equal to the sum of the surface areas of these two spheres.

asked by Perlie on September 12, 2016
92. ## ALgebra

Three years ago, Wendy's age was 3/4 as old as Erna and Lucys age was 2/3 as okd as Erna. If the sum of their ages is 67, find the present age of each.

asked by Raquel on September 26, 2016
93. ## Engineer Mechanics

60-kg skier passes point a with a speed of 5 m/s, determine his speed when he reaches point b. also find the normal force exerted on him by the slope at this point.

asked by Gubby on November 15, 2010
94. ## Maths

Draw and label a figure to represent the congruent triangle. Then find X and Y. Triangle YXZ congruent triangle CAB, m

asked by Ola on June 7, 2017
95. ## pre calculus

use the rational zeros theorem to find all the real zeros of the polynomial function. use the zeros to factor f over the real numbers: f(x)=x^4+2x^3-7x^2-8x+12 I am totally lost, please help?

asked by michelle on April 29, 2013
96. ## math

A kite is attached to a string. Find the length of string,when the height of the kite is 60m and the string makes the angle 30 degree with the ground.

asked by komal on September 19, 2016
97. ## intermediate algebra

find two algebraic expressions for the area of each figure. first ,regard the figure as one large rectangle, and then regard the figure as a sum of four smaller rectangles 3 t,t,5

asked by swirl on July 10, 2011
98. ## geometry

The longer diagonal of a rhombus is 2 times as long as the shorter diagonal. Find the length of the shorter diagonal if the area is 24in squared.

asked by Mandy on March 24, 2010
99. ## help

i need help solvin this quadratic equation 2x^2+x-6=0 1/3x^2+8x-3=0 Try to factor, then set the factors equal to 0 to find possible solutions for x. For the first one: 2x^2 + x - 6 = 0 Factors are: (2x - 3)(x + 2) = 0 Setting the factors equal to 0: 2x - 3

asked by jc on April 29, 2007
100. ## physics

two forces 20N each are inclined at 100 degree to each other.find the single force that will; replace the given force system balance the given force system

asked by rezny on January 16, 2013