Tuesday

February 28, 2017
**basic calculus**

x^3+x^2y+2y^2=0

*Tuesday, January 31, 2017 by elijeh*

**basic calculus**

x^3+x^2y+2y^2

*Tuesday, January 31, 2017 by elijeh*

**basic calculus**

find a appropriate formula for the area of a narrow circular ring....wedding band made of circular wire

*Tuesday, January 31, 2017 by elijeh*

**basic calculus**

find a appropriate formula for the area of a narrow circular ring

*Tuesday, January 31, 2017 by elijeh*

**Calculus AB**

What's the lim(x-->-infinity) sqrt(x^4-1)/(x^3-1)? I've tried solving for it but I got -1/0, which would make it undefined. Is that correct?

*Tuesday, January 31, 2017 by Annie*

**Calculus AB**

So the problem is "For x>0, d(lnx)/dx = 1/x and lne=1. A) find the tangent line approximation for ln 3 B) calculate the %error in approximation in part A. My teacher said the answer for part A is that 1/e, and I'm pretty confused. So far I the given info into point slope ...

*Monday, January 30, 2017 by Annie*

**Pre-Calculus**

How to solve sin(x/2) = 1 - cos x? I know you would use the half angle identity sin(x/2) = +-(√1 - cos x/2), just don't know what to do from there.

*Monday, January 30, 2017 by Karen*

**Pre-Calculus**

How to solve sin(x/2) = 1 - cos x? I know you would use the half angle identity sin(x/2) = +-(√1 - cos x/2), just don't know what to do from there.

*Monday, January 30, 2017 by Karen*

**Calculus II**

Sketch the region R defined by 1 ≤ x ≤ 2 and 0 ≤ y ≤ 1/x3. a) Find (exactly) the number a such that the line x = a divides R into two parts of equal area b) Then find (to 3 places) the number b such that the line y = b divides R into two parts of equal area

*Monday, January 30, 2017 by Angel Santos*

**applied calculus**

From a height of 25 meters a ball is thrown vertically upwards at a velocity of 5 meters per second. a.What time in seconds will the ball reach its maximum height? b.What is its maximum height? c.When will the ball strike the ground? d.What will be the ballâ€™s velocity ...

*Sunday, January 29, 2017 by Laura*

**Calculus**

I am having trouble with this question and I am unsure how to solve it... True or False (with justification) The function sin(x) if x ≤ 0 f(x) = 1+cos(x) if x>0 has a jump discontinuity at x = 0.

*Sunday, January 29, 2017 by Emily*

**calculus**

I have a definition lim theta approaching 0 sin theta/theta = 1 so show if the limit x approaching 0 sin2x/5=2/5

*Sunday, January 29, 2017 by sarah*

**calculus**

define f(x)={x+a if x>2 {-1 if x=2 {ax+b if x<2. How to determine the values of a and b for which f(x) is continuous in the set of real numbers.

*Sunday, January 29, 2017 by Angel*

**calculus**

Define h(x)={x^2 if x>=-1 {ax+b if x<-1 If f(-2)=-1, how do i determine the values of a and b for which h(x) is continuous in the set of real numbers

*Sunday, January 29, 2017 by Qin*

**calculus**

Let g(x)={x^2-x-2 if x is not equal to 1 {0 if x=1

*Sunday, January 29, 2017 by Liv*

**Calculus can you please show me the step by step s**

The intensity of light varies inversely as the square of the distance from its source. If two searchlights are 600 meters apart and one light is 8 times as strong as the other, where should a man cross the line between them in order to be illuminated as little as possible

*Saturday, January 28, 2017 by John*

**Calculus**

The intensity of light varies inversely as the square of the distance from its source. If two searchlights are 600 meters apart and one light is 8 times as strong as the other, where should a man cross the line between them in order to be illuminated as little as possible

*Saturday, January 28, 2017 by John*

**basic calculus**

The area of the surface of a sphere of radius r is 4πr^2. If the estimate radius of a spherical balloon is 200 meter and this estimate is too small by 1/2 meter. Find the approximate surface area in sq. m.

*Friday, January 27, 2017 by yumie*

**calculus**

A stone thrown up from the top of a building with a velocity of 48 meter per second reaches the ground with a velocity of -50 m/s. Find the height of the building. Using the derivative of approximation.

*Friday, January 27, 2017 by airrah mae*

**Calculus**

Find the vertical translation of y=|x| that "supports" the parabola y = x^2. Hint: You should find 'c' so that y = |x|+c just touches y = x^2. You may as well consider only the right-hand side of the picture first. (Why?)

*Thursday, January 26, 2017 by Anonymous*

**Applied Calculus**

From a height of 25 meters a ball is thrown vertically upwards at a velocity of 5 meters per second. a. What time in seconds will the ball reach its maximum height? b. What is its maximum height? c. When will the ball strike the ground? d. What will be the ball’s velocity ...

*Thursday, January 26, 2017 by jay*

**Calculus**

Let A denote the portion of the curve y = sqrt(x) that is between the lines x = 1 and x = 4. 1) Set up, don't evaluate, 2 integrals, one in the variable x and one in the variable y, for the length of A. My Work: for x: âˆ«[4,1] sqrt(1+(dy/dx)^2) dy/dx = 1/2sqrt(x) (dy/dx)^2...

*Wednesday, January 25, 2017 by Daisy*

**calculus**

find the limit without using L'Hopital's Rule Lim(X->-4) (16-x^2 / x+4)

*Wednesday, January 25, 2017 by jaime*

**Calculus**

Knowing that Pi/2 < x < Pi and that 0<y< Pi/2 that sinx = 1/5 and that cos y = 1/8, find sin (x+y), sin (x-y), cos (x+y) and cos (x-y). Explain.

*Wednesday, January 25, 2017 by MArc*

**calculus**

Use implicit differentiation to find an equation of the tangent line to the curve 3xy^3+4xy=63 at the point (9,1)(9,1).

*Wednesday, January 25, 2017 by gloria*

**calculus**

A spherical balloon is inflated so that its volume is increasing at the rate of 3.2 ft3/min. How rapidly is the diameter of the balloon increasing when the diameter is 1.1 feet?

*Wednesday, January 25, 2017 by gloria*

**Calculus**

Find two non-intersecting intervals where f(x) +12x^4 + 50x^3 + 80x^2-100 has at least one root. Justify your answer.

*Tuesday, January 24, 2017 by MArc*

**Calculus**

Compute F'(-4) where F(x) = x^3 + X^2 (using the definition of the derivative)

*Tuesday, January 24, 2017 by Justine*

**Calculus**

Find all the values of (x) in the interval [0, 2Pi], such that sec^2 (x) = 4

*Tuesday, January 24, 2017 by Severin*

**Calculus**

A manufacturer buys $280,000 worth of machinery that depreciates linearly so that its trade-in value after 10 years will be $30,000. Express the value of the machinery (V) as a function of its age (t).

*Tuesday, January 24, 2017 by jaaaay*

**Calculus**

y = 2 cos(5πx) .... whats the period?

*Tuesday, January 24, 2017 by Anonymous*

**Calculus**

Find the equation in standard form for the line that satisfies the given requirements. horizontal line through (−8, −9)

*Tuesday, January 24, 2017 by Anonymous*

**Calculus**

Piecewise function x if −2≤x≤0; x^2 if −2<x<0; 8-x. If if −2≤x≤3; (d) Write down an analytic formula for f^{-1}, and state its domain and range.

*Tuesday, January 24, 2017 by Po*

**Calculus**

Solve the quadratic equation by factoring. (Enter your answers as a comma-separated list.) 5x2 − 23x = −12

*Tuesday, January 24, 2017 by jay*

**Calculus**

Can you please check to see if these answers are correct? I have provided my work as well! That you! This is much appreciated!! 1. What is the volume of the solid that is generated by revolving the region bounded by the curves x = 3y^2-2 and x = y^2 and y = 0 about the x axis...

*Monday, January 23, 2017 by Daisy*

**Pre-Calculus**

The base of the fish tank below has a length of 40 inches, a width of 20 inches, and height of 1.5 feet. The tank starts off with a water depth of 7 inches. You then add water to the tank at a constant rate such that the water level increases 1 inch every 2 minutes. Wirte a ...

*Monday, January 23, 2017 by Tod*

**Calculus**

Find inverse equation of y= 3e^(x-1)^5 Answer I got is (ln(x/3))^(1/5) +5 =y But I think it's wrong because the domain and range is really different from the original equation

*Sunday, January 22, 2017 by Po*

**calculus**

A 17- foot ladder is leaning against a wall, and begins to slide. The top of the ladder is falling at a rate of 2 feet per second at the instant that the bottom of the ladder is 8 feet from the wall. What is the rate of change of the distance between the bottom of the ladder ...

*Sunday, January 22, 2017 by angie*

**calculus**

The mechanics at lincoln automotive are reboring a 6-in. deep cylinder to fit a new piston. The machine they are using increases the cylinder's radius 0.02 inches each second. How rapidly is the cylinder volume increasing when the bore (diameter) is 3.8 in.?

*Sunday, January 22, 2017 by judy*

**calculus**

Melissa wants to make a rectangular box with a square base and cover its top and bottom faces with velvet, which will cost her $3 per square inch, and the sides with silk, which will cost her $5 per square inch. The box should have a volume of 1600 cubic inches. Find the ...

*Sunday, January 22, 2017 by judy*

**Calculus**

Does F(x)=9-x^2 satisfy the hypothesis of the mean value theorem on the interval [0,3]? if it does, then find the exact values of all Ce(0,3) that satisfy the conclusion of the Mean Value Theorem.

*Sunday, January 22, 2017 by Angie*

**Calculus**

Consider the function f(x) = -3x+2. Notice the limit of f(x) as x approaches 1 is -1. Find a value for delta such that is the distance x is from 1 is less than delta, then the distance from f(x) to -1 is less than 0.05

*Sunday, January 22, 2017 by Jeff*

**maths calculus also**

what is the area enclosed by the curved y=4x-x^2,and y=x^2-2x along the x-axis thanks so much help

*Thursday, January 19, 2017 by rajah*

**maths help calculus**

the area of a circle increasing at the rate of 3cm/sec.find the rate of change of the circumference when the radius is 2cm help plz

*Thursday, January 19, 2017 by rajah*

**Calculus**

Hello, I would like to make sure the answers to these questions are correct. 1. Using the shell method, what is the volume of a solid that is generated by rotating the region by y = x^2 and x = y^2 about the x axis. My Work: r = y h = sqrt(y) - y^2 2pi ∫[0,1] (y)((sqrt(y) - ...

*Wednesday, January 18, 2017 by Daisy*

**calculus**

how do you find the derivative of this (-x^2)/ (2) +2 and does it have any x intercepts, asypmtotes, or holes.

*Wednesday, January 18, 2017 by angie*

**Calculus**

How do you fine the derivative of (x-3)^-3

*Wednesday, January 18, 2017 by Angie*

**Pre-Calculus**

sketch f(x) such that f(x) is increasing on (-inf,-2) and f is decreasing on (-2,0), f(x) has point discontinuity at x=-2, f(x) has a horizontal asymptote of y=4, f(x) is an odd function.

*Wednesday, January 18, 2017 by Tod*

**Calculus Answer Check**

A particle moves along a line so that its position at any time t >= 0 is given by the function -t^3 + t^2 + 5t + 3, where p is measured in feet and t is measured in seconds. 1. Find the displacement during the first four seconds. My answer: 75 ft 2. Find the average ...

*Wednesday, January 18, 2017 by Anonymous*

**Calculus algebra review**

((1/2+h) -(1/2)) / h found LCD of numerator ((2)-(2+h)/2(2+h))/h is it 1

*Tuesday, January 17, 2017 by sarah*

**Calculus (Sequences)**

Hello, here is a picture of the question I am trying to solve, I believe the answer to be C, but I would just like some confirmation/correction. goo. gl/gWfhVn

*Tuesday, January 17, 2017 by Tim*

**AP Calculus**

Consider the function f(x) = 1/4x^4 - 5/3x^3 - 3/2x^2 + 15x - 3. A. Find the relative extrema for f(x); be sure to label each as a maximum or minimum. You do not need to find function values; just find the x-values. B. Determine the interval(s) where f(x) is increasing (if any...

*Monday, January 16, 2017 by Steph*

**Calculus**

I would like to make sure my answer is correct: Question: the base of a solid is the triangular region with the vertices (0,0), (2,0), and (0,4). Cross sections perpendicular to the x-axis are semicircles. Find the volume of this solid. My Work: ∫[0,2] (pi/2)(r^2)dx r = (-2x...

*Monday, January 16, 2017 by Rose*

**calculus**

Find the values for the following functions. If f(x)=2^x, show that f(x+3) -f (x-1)=15/2f(x) If G(x)= sin 2x, find G(0),G(1/4 pie),and G(7/8 pie)

*Monday, January 16, 2017 by jacob*

**calculus**

Find the domain of the variable x for which the following equations determine y as a real function of x. If G(x)= sin 2x, find G(0),G(1/4 pie),and G(7/8 pie) can someone help me please!

*Monday, January 16, 2017 by jacob*

**Vector Calculus**

Can someone help me with this please. A vector field in cylindrical polar co-ordinates is given by V = R Rˆ + R 3 s i n ( φ ) c o s ( φ ) φˆ + 3 z kˆ where Rˆ, φˆ, kˆ are the appropriate unit vectors. Translate this vector field into the Cartesian x, y, z co-ordinate...

*Monday, January 16, 2017 by Ariana*

**Calculus**

I would like to know if my answers are correct: Disclaimer: We are allowed to keep our answers in formula form 1. Use the washer method to find the volume of the solid that is generated by rotating the plane region bounded by y=x^2 and y = 2-x^2 about the axis y=-1 My Work: [...

*Monday, January 16, 2017 by Daisy*

**calculus**

Find the domain of the variable x for which the following equation determine y as a real function of x. y - xy = 5

*Sunday, January 15, 2017 by nabs*

**vector calculus**

Can someone help me with this please. A vector field in cylindrical polar co-ordinates is given by V = R Rˆ + R 3 s i n ( φ ) c o s ( φ ) φˆ + 3 z kˆ where Rˆ, φˆ, kˆ are the appropriate unit vectors. Translate this vector field into the Cartesian x, y, z co-ordinate...

*Sunday, January 15, 2017 by Ariana*

**Applied calculus**

A rectangular plot requires 2000 m of fencing to enclose it. If one of the dimensions is x meters, express the area y (m2) as a function of x. Determine the range of x.

*Saturday, January 14, 2017 by jayden*

**Calculus**

From each corner of a square of tin, 12 cm on a side, small squares of side x are removed and the edges are turned up to form an open box. Express the volume V (cm3) as a function of x. Determine the range of x.

*Saturday, January 14, 2017 by jayden*

**Calculus**

Find any critical numbers of the function f(Ø)= 2secØ +tanØ, 10π < Ø < 12π A. 67π/6 B. 71π/6 C. 63π/6 D. A and B

*Friday, January 13, 2017 by hhhhh*

**Calculus**

Find the value of the derivative of the function f(x)=7-|X| at the extrema point (0,7)? A. Does not exist B. 0 C. 7 D. -7

*Friday, January 13, 2017 by hhhhh*

**Calculus**

If f is differentiable at x=c, which of the following statements must be true? A. f is continuous at x=c B. f^1 is continuous at x=c^1 C. f is continuous at y=c D. f is continuous at y^1=c

*Friday, January 13, 2017 by hhhhh*

**Calculus**

A surgical laser is cutting an incision in the eye according to the equation x^2-4y^2=9, y>0. The incision rates vary to allow for curvature of the eye. When x=5, dx/dt=300 manometers per second. What is dy/dt at that moment? A. 18.75 manometers per second B. 93.75 ...

*Friday, January 13, 2017 by hhhhh*

**Calculus**

What is dy/dx given that xy^2-xy+x=y?

*Friday, January 13, 2017 by hhhhh*

**Calculus**

Which of the following is written in explicit form? A.y=x B.x^2-6xy-9y^2=0 C.y=0 D. y= -√1-x^2

*Friday, January 13, 2017 by hhhhh*

**Calculus**

What is the derivative of h(x)= 3x+2/x^2-5?

*Thursday, January 12, 2017 by hhhhh*

**Calculus**

What is dy/dx when y=(x^2 - 4x ) ^3 ? A. 3(x^2 -4x)^2 B. (6x - 12) (x^2 -4x)^2 C. 3(2x - 4)^2 D. 6x^2(2x-4)^2

*Thursday, January 12, 2017 by hhhhh*

**Calculus**

What is the derivative of k(x)=sin x cos x? A. -sin x cos x B. -2 sin x cos x C. 2 cos^2x-1 D. sin^2x - cos^2x

*Thursday, January 12, 2017 by hhhhh*

**Calculus**

If the position function in feet for a free-falling particle on Planet X is s(t)= -8t^2 +16 + 64, what is the velocity of the after 2 seconds in feet per second? A. -32 B. -16 C. 16 D. 64

*Thursday, January 12, 2017 by hhhhh*

**Calculus**

From each corner of a square of tin, 12 cm on a side, small squares of side x are removed and the edges are turned up to form an open box. Express the volume V(cm3) as a function of x. Determine the range of x.

*Wednesday, January 11, 2017 by nabeel*

**Calculus**

f'(x)=sqrt(x)*sin(x) The first derivative of the function f is given above. If f(0)=0, at which value of x does the function f attain it's minimum value on the closed interval [0,10]? I know the answer is 6.28, but I need steps as to why. Please and thank you.

*Wednesday, January 11, 2017 by Mike*

**PLEASE HELP BEEN STUCK ALL DAY CALCULUS**

The radius of a 12 inch right circular cylinder is measured to be 4 inches, but with a possible error of ±0.2 inch. What is the resulting possible error in the volume of the cylinder? Include units in your answer.

*Wednesday, January 11, 2017 by Someone*

**Calculus Please Help**

The radius of a 12 inch right circular cylinder is measured to be 4 inches, but with a possible error of ±0.2 inch. What is the resulting possible error in the volume of the cylinder? Include units in your answer. my answer 30.16

*Wednesday, January 11, 2017 by Someone*

**Calculus Please Help**

evaluate the table and find d/dx [g[f(2x)]] at x=1 f(x) 6,1,6,2 f'(x) 1,2,5,7 g(x) 1,4,4,3 g'(x) 4,5,5,-4

*Wednesday, January 11, 2017 by Someone*

**Calculus**

Find the x-coordinates where f '(x) = 0 for f(x) = 2x + sin(2x) in the interval [0, 2π]. MY ANSWERS: x = π/2 x = 3π/2

*Wednesday, January 11, 2017 by Someone*

**Calculus**

a 160-inch strip of metal 20 inches wide is to be made into a small open trough by bending up two sides on the long side , at right angles to the base. the sides will be the same height , x. if the tgrough is to have a maximum volume, how many inches should be turned up on ...

*Wednesday, January 11, 2017 by Someone*

**Calculus**

The radius of a 12 inch right circular cylinder is measured to be 4 inches, but with a possible error of ±0.2 inch. What is the resulting possible error in the volume of the cylinder? Include units in your answer. V = πr²h = 16πr² dV/dr = 32πr dV = 16πr dr Let dV and dr...

*Wednesday, January 11, 2017 by Someone*

**Calculus**

The end behavior of f(x)=(2+x^2)/(x^2-36) most closely matches which of the following: y=1 y=-18 y=2 y=0 I still don't get this based on steve's answer will someone please help?

*Wednesday, January 11, 2017 by Someone*

**Calculus**

if f(x)= |(x^2-9)(x^2+1)| how many numbers in the interval [-1,1] satisfy the mean value theorem? None 1 2 3 Will someone please explain in detail?

*Wednesday, January 11, 2017 by Someone*

**Calculus**

A particle moves along the x-axis with position function s(t) = e^cos(x). How many times in the interval [0, 2π] is the velocity equal to 0? 1< My answer 2 3 More than 3 I don't really get this question will someone please explain it to me?

*Wednesday, January 11, 2017 by Someone*

**calculus**

The bending moment (BM) along a beam BM = 30x -5x2 kNm where x is the distance in metres from the left hand end. Find the position and value of the maximum bending moment.

*Wednesday, January 11, 2017 by Sammy*

**Calculus**

Can you please help me get the solution to this limit without using squeeze theorem and l'hopitals rule lim x to 0 of x^3 sin(1/x) lim x to 0 of x^2 sin^2(1/x)

*Wednesday, January 11, 2017 by Liv*

**Calculus**

The end behavior of f(x)=(2+x^2)/(x^2-36) most closely matches which of the following: y=1 y=-1 y=2 y=0 There is no leading coefficient so I am not sure what the answer is.

*Wednesday, January 11, 2017 by Someone*

**calculus**

A particle is moving with the given data. Find the position of the particle. a(t) = t2 − 5t + 3, s(0) = 0, s(1) = 20 s(t) =

*Tuesday, January 10, 2017 by lisa*

**pre-Calculus**

Make a conjeture about the symmetry of a) a product of two odd functions b) a product of two even functions c) a product of an odd function and an even function

*Tuesday, January 10, 2017 by Kevin*

**AP Calculus**

Ship A is sailing due west at 8km/hr when it sees ship B northwest of its present position. If ship B is sailing due south at 3km/hr, then how close will they come on their courses?

*Monday, January 9, 2017 by J*

**Pre-Calculus**

Tommy is building a rectangular playpen for his pigs where one side of the play area is a side of his barn. He has enough material to make a fence with a total length of 160 feet. write a función that represents the playpen's área in terms of its length perpendicular to the ...

*Sunday, January 8, 2017 by Kevin*

**Pre-Calculus**

A cylinder's height is 5cm longer than the radias of its base. Write a función modeling the cylinder's volume in terms of its diameter.

*Sunday, January 8, 2017 by Calvin*

**Pre-Calculus**

Squares of side length x are removed from the 4 corners of an 11in by 8.5in piece of paper. The sides are then folded up to create an open-top box. Write a funcion that determines the volume of the box and determine the functions range. How much should be cut from the corners ...

*Sunday, January 8, 2017 by Calvin*

**calculus**

how do I graph this using the first and second derivative and three sign charts. i have to label the inflection point, extreme values and the intercepts also. f(x)= x^3-6x^2

*Sunday, January 8, 2017 by angie*

**calculus**

Water leaking onto a floor creates a circular pool with an area that increases at the rate of 3 square inches per minute. How fast is the radius of the pool increasing when the radius is 10 inches?

*Sunday, January 8, 2017 by angie*

**Calculus**

What is the largest possible product of two non-negative number whose sum is 1

*Sunday, January 8, 2017 by Josh*

**calculus**

What is the largest possible product of two negative number whose sum is 1?

*Sunday, January 8, 2017 by Josh*

**calculus**

is my answer to this question correct A spherical balloon is losing air at the rate of 2 cubic inches per minute. How fast is the radius of the ballon shrinking when the radius is 8 inches. Answer= .0024

*Sunday, January 8, 2017 by Josh*

**calculus**

Is this the correct answers for these questions Verify the means value theorem holds on the interval shown. Then, find the value c such that f'(c)=(f(b)-f(a))/(b-a) b.f(x)=x^3=x-4 on [-2,3] c= square root 7/3 c. f(x)= x^3 on [-1,2] c= square root 1 d. f(x)= Sqr. root of x on[...

*Sunday, January 8, 2017 by Angela*

**calculus**

A spherical balloon is losing air at the rate of 2 cubic inches per minute. How fast is the radius of the ballon shrinking when the radius is 8 inches.

*Sunday, January 8, 2017 by Josh*

**calculus**

Given, F(n+1)-12f(n)=0. n≥1, where F(1)=-3 find the solution to the equation.

*Sunday, January 8, 2017 by .....*

**calculus**

find the maximum and minimum value of the function f(x)= x-x^3 on the interval [-2,2] I also need help with this question What is the largest possible product of two negative number whose sum is 1?

*Sunday, January 8, 2017 by jake*