Thursday

February 23, 2017
**Pre calculus**

Your computer supply store sells two types of laser printers. The first type, A, has a cost of $86 and you make a $45 profit on each one. The second type, B, has a cost of $130 and you make a $35 profit on each one. You expect to sell at least 100 laser printers this month and...

*Friday, March 4, 2016 by Maddie*

**Calculus**

Find the range of the function ∫sqrt(4-t^2) dt where a=0 =x [0, 4π] [0, 2π] [-4, 0] [0, 4]

*Friday, March 4, 2016 by Henry*

**calculus**

a) Obtain all solutions of the equation z^3 +1 = 0 b) Let z = x + iy. Obtain the real and imaginary parts of the function f(z) = 1/1+z c) Let f(x + iy) = x^2 - y^2 + iv( x,y). Determine a function v such that f is differentiable in the whole complex plane. Express f as a ...

*Thursday, March 3, 2016 by jack*

**Calculus Related Rates**

Two people leave from the same spot and walk at 4ft/sec going north and 5ft/sec going northwest. At 30 seconds, how fast is the distance between them changing?

*Thursday, March 3, 2016 by Sally*

**Calculus**

Find the y-intercept of the tangent line to y= -0.2/sqrt(6+5x) at(2.5,-0.04990597277) Thanks

*Thursday, March 3, 2016 by Niki*

**calculus 1**

f(x) = 3x^3 - 9x + 5 find the: 1) zeroes or undefined values 2) intervals where the function is greater than zero 3) intervals where the function is less than zero 4) coordinates of all maxima and minima 5) intervals where the function is increasing 6) intervals where the ...

*Thursday, March 3, 2016 by i*

**Calculus Related Rates**

Mulch is dumped into a pile with height always 1/3 the diameter at a rate of 30 ft^3/hr. How fast is the height increasing when it is 6 ft tall?

*Thursday, March 3, 2016 by Sally*

**pre calculus**

A box with a square base and no top is to be made from a square piece of carboard by cutting 5 in. squares from each corner and folding up the sides. The box is to hold 23805 in3. How big a piece of cardboard is needed?

*Thursday, March 3, 2016 by Hai*

**Pre calculus**

You have a wire that is 71 cm long. You wish to cut it into two pieces. One piece will be bent into the shape of a square. The other piece will be bent into the shape of a circle. Let A represent the total area of the square and the circle. What is the circumference of the ...

*Thursday, March 3, 2016 by Hai*

**Calculus**

A rectangle is bounded by the x-axis and the semicircle y = sqrt(36-x^2). What length and width should the rectangle have so that its area is a maximum? I understand that 2xy = A and that 4x + 2y = P, but I'm not sure how to solve for a variable to plug back into the equation...

*Wednesday, March 2, 2016 by Jane*

**Math**

Using FTC(fundamental theory of calculus) evaluate the derivative of: (definte integral- lower bound 0 and upper 2) ∫|2x-1|dx I have no idea how to do this, especially because the dx is on the same side of the equation. It is usually d/dx, but this is also on the other ...

*Wednesday, March 2, 2016 by Cindy*

**Calculus**

Determine if the Mean Value Theorem for Integrals applies to the function f(x) = 5 - x^2 on the interval 0 to sqrt 5 . If so, find the x-coordinates of the point(s) guaranteed by the theorem.

*Wednesday, March 2, 2016 by Henry*

**Calculus**

Find the lengths of a triangle whose two sides lie on the coordinate axes and the other side passes through the point (1,1)

*Tuesday, March 1, 2016 by Anonymous*

**Calculus**

Find the lengths of a triangle whose two sides lie on the coordinate axes and the other side passes through the point (1,1)

*Tuesday, March 1, 2016 by Anonymous*

**Calculus Related Rates**

A hot air balloon, 50 feet from an observer, is rising at 20 ft/sec. At 5 seconds after lift off 1. How fast is the distance between the observer and the balloon changing? 2. How fast is the angle of elevation changing?

*Tuesday, March 1, 2016 by Mary*

**AP Calculus AB**

For an object whose velocity in ft/sec is given by v(t) = -t^2 + 6, what is its displacement, in feet, on the interval t = 0 to t = 6 secs? -36 36 0 55.596 For an object whose velocity in ft/sec is given by v(t) = -2t^2 + 4, what is its distance travelled, in feet, on the ...

*Tuesday, March 1, 2016 by Vikram*

**Calculus**

Two sides of a triangle are 2 meters and 3 meters and the angle between them is increasing at 0.5 radians/second when the angle is pi/4. 1. How fast is the distance between the tips increasing? 2. How fast is the area increasing? I got part of #1 but I am getting multiple ...

*Tuesday, March 1, 2016 by Mary*

**Calculus**

A horizontal trough is 40 cm long and its ends are in the form of an isosceles trapezoids with an altitude of 20 cm, a lower base of 20 cm and an upper base of 3 cm. Water is being poured into the trough at the rate of 5 cm/sec. How fast is the water level rising when the ...

*Tuesday, March 1, 2016 by Pauline*

**Calculus**

If the radius of a circle increasing at the rate of 4 cm/sec, find the rate of the increase in the area when the radius is 12 cm.

*Tuesday, March 1, 2016 by Pauline*

**Calculus**

A tank in the form of an inverted cone having an altitude of 2 meters and a base radius of 50 cm. Water if flowing into the tank at the rate of 10 cube centimeters/sec. How fast is the water level rising when the water level is 80 cm deep?

*Tuesday, March 1, 2016 by Pauline*

**calculus**

A baseball player is running from the at 20 ft/sec. At what rate is his distance from the home plate changing when he is 30 ft from the third base. The baseball diamond is a square 90 ft on a side.

*Tuesday, March 1, 2016 by Pauline*

**Calculus, Math word problems.**

A closed box is to be made in the shape of a cubiod, of height h cm and with a square base that has sides of length x cm. Its volume V is required to be 500 cm^3. A) write an expression for the V (volume)in terms of h and x. B)Write an expression for the surface area A in ...

*Tuesday, March 1, 2016 by Mat*

**Calculus**

A rectangular box has a square base with an edge length of x cm and a height of h cm. The volume of the box is given by V = x2h cm3. Find the rate at which the volume of the box is changing when the edge length of the base is 10 cm, the edge length of the base is increasing at...

*Monday, February 29, 2016 by jjoossiiee*

**Calculus help, very confused!!**

A fundamental problem in crystallography is the determination of the packing fraction of a crystal lattice, which is the fraction of space occupied by the atoms in the lattice, assuming that the atoms are hard spheres. When the lattice contains exactly two different kinds of ...

*Monday, February 29, 2016 by Sam Johnston*

**Calculus**

Two sides of a triangle are 2 meters and 3 meters and the angle between them is increasing at 0.5 radians/second when the angle is pi/4. 1. How fast is the distance between the tips increasing? 2. How fast is the area increasing? I got part of #1 but I am getting multiple ...

*Monday, February 29, 2016 by Mary*

**calculus**

Find derivative of function g (t)=(6t^2+5)^3 (t^3-7)^4 thank you very much!

*Monday, February 29, 2016 by Danniela*

**Calculus/Vectors**

Two math students erect a sun shade on the beach. The shade is 1.5 m tall, 2 m wide, and makes an angle of 60° with the ground. What is the area of shade that the students have to sit in at 12 noon (that is, what is the projection of the shade onto the ground)? (Assume the ...

*Monday, February 29, 2016 by HJ*

**Pre-Calculus**

An investor has $100,000 to invest in three types of bonds: short-term, intermediate-term, and long-term.How much should she invest in each type to satisfy the given conditions? Short-term bonds pay 4% annually, intermediate-term bonds pay 5%, and long-term bonds pay 6%. The ...

*Sunday, February 28, 2016 by Frank*

**Calculus**

Stock Speculation: In a classic paper on the theory of conﬂict, L.F. Richardson claimed that the proportion p of a population advocating war or other aggressive action at a time t satisﬁes p(t) = (Ce^kt) / (1 + Ce^kt) where k and C are positive constants. ...

*Sunday, February 28, 2016 by Wade Wilson*

**Calculus**

Stock Speculation: In a classic paper on the theory of conﬂict, L.F. Richardson claimed that the proportion p of a population advocating war or other aggressive action at a time t satisﬁes p(t) = (Ce^kt) / (1 + Ce^kt where k and C are positive constants. ...

*Sunday, February 28, 2016 by Wade Wilson*

**Calculus Pre Test Questions Monday Part 4**

After t minutes of growth, a certain bacterial culture has a mass, in grams, of M(t) =t^2. a. How much does the bacterial culture grow during the time 3<t<3.01? b. What is its average rate of growth during the time interval 3<t...

*Saturday, February 27, 2016 by Morris*

**Calculus Pre Test Questions Monday Part 4**

After t minutes of growth, a certain bacterial culture has a mass, in grams, of M(t) =t^2. a. How much does the bacterial culture grow during the time 3<t<3.01? b. What is its average rate of growth during the time interval 3<t...

*Saturday, February 27, 2016 by Morris*

**Calculus Pre Test Monday Part 3**

The height, in metres, of an object that has fallen from a height of 180 m is given by the position function s(t)=-5t^2 +180, where t >0 and t is in seconds. a. Find the average velocity during each of the first two seconds. b. Find the ...

*Saturday, February 27, 2016 by Morris*

**Calculus**

Calculate the slope of the graph of f(x)=4-x^2 if x<1 and 2x+1 if x>1 at each of the following points: a.P(-1,3) b.P(2,5)

*Saturday, February 27, 2016 by Morris*

**Calculus**

Hellp I have a calculus test on Monday 2. Calculate the slope of the tangent to the given function at the given point or value of x a. f(x)=3/x+1,P(2,1) b.h(x)=2/squareroot x + 5, P(4,2/3) ****Full solutions to please because I do not know what I'm doing and so confused with ...

*Saturday, February 27, 2016 by Morris*

**calculus**

A ship, proceeding southward on a straight course at the rate of 12 miles/hr is, at noon, 40 miles due north of a second ship, which is sailing west at 15 miles/hr. a) How fast are the ships approaching each other 1 hour later? b) Are the ships approaching each other or are ...

*Saturday, February 27, 2016 by Andrea*

**calculus**

An angler has a fish at the end of his line, which is being reeled in at the rate of 2 feet per second from a bridge 30 feet above the water. At what speed is the fish moving through the water towards the bridge when the amount of line out is 50 feet? (Assume the fish is at ...

*Saturday, February 27, 2016 by Andrea*

**calculus**

The sales(in millions) of a DVD recording of a hit movie t years from the date of release is given by a) Find the rate of which the sales are changing at time t. b) How fast are the sales changing at the time the DVDs are released? c) How fast are the sales changing two years ...

*Saturday, February 27, 2016 by Andrea*

**calculus**

Sand is falling into a conical pile so that the radius of the base of the pile is always equal to one half its altitude. If the sand is falling at the rate of 10 cubic feet per minute, how fast is the altitude of the pile increasing when the pile is 5 feet deep?

*Saturday, February 27, 2016 by Andrea*

**Pre calculus**

Dternine the unknown side and angles of each triangle give both solutions. In Abc. Angle C is 31 degrees. a is 5.6 cm and c is 3.9 cm. solve this triangle and give both solutions along with all the steps. tanks

*Friday, February 26, 2016 by Pre cal 11*

**Calculus**

Estimate the area of the plane region bounded by the graph of f(x) = e^x, the x-axis, and the vertical lines x = 0 and x = 8 using the trapezoidal method with trapezoids of equal width. Round your answer to 4 decimal places. I got the answer 6892.7480 but it was incorrect and ...

*Friday, February 26, 2016 by Andrea*

**Calculus**

Water is leaking out of an inverted conical tank at a rate of 13500.0 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 12.0 meters and the diameter at the top is 5.5 meters. If the water level is rising...

*Friday, February 26, 2016 by Taylor*

**pre-calculus**

Find all the vertical and horizontal asymptotes for (x^2+4x+3)/(x^2-1) All I can figure out is that if the degree of the denominator is bigger than the numerator, then y=0. But I don't know if that's right! Please help. Thank you!

*Thursday, February 25, 2016 by Anonymous*

**Pre-Calculus**

A drawbridge is l = 110 feet long when stretched across a river. As shown in the figure below, the two sections of the bridge can be rotated upward through an angle of α = 34°. a)If the water level is 35 feet below the closed bridge, find the distance d between the end ...

*Thursday, February 25, 2016 by Tim*

**Pre-Calculus**

A person flying a kite holds the string 4 feet above ground level. The string of the kite is taut and makes an angle of 60° with the horizontal (see the figure). Approximate the height of the kite above level ground if 500 feet of string is payed out. (Round your answer to ...

*Thursday, February 25, 2016 by Tim*

**Calculus**

A 10 cm x 12 cm rectangular sheet that is used to make a box with open top is to be lined with cushion. if the cushion material for the sides costs four times per square centimeter as that of material for the bottom, find the dimensions of the box if the cost is to be minimized.

*Thursday, February 25, 2016 by Pauline*

**Calculus**

Two sides of a triangle have lengths 8 m and 13 m. The angle between them is increasing at a rate of 0.08 radians /min. How fast is the length of the third side increasing when the angle between the sides of fixed length is π/3 radians. Please help I have been stuck on ...

*Thursday, February 25, 2016 by Mary*

**Calculus**

A telecommunications company has 50,000 units of mobile cellular subscribers and charges P8.00 per minute of voice calls. The officials believe that if the charge is reduced, the number of subscribers will increase at the rate of 1000 units for each centavo reduction. What ...

*Thursday, February 25, 2016 by Xiugine*

**Calculus**

A gutter with trapezoidal cross-section is to be made from a long sheet of stainless steel that is 30 cm wide by turning up one-fourth of the width on each side. What width across the top will give the maximum cross sectional area?

*Thursday, February 25, 2016 by Regine*

**Calculus**

A 10 cm x 12 cm rectangular sheet that is used to make a box with open top is to be lined with cushion. if the cushion material for the sides costs four times per square centimeter as that of material for the bottom, find the dimensions of the box if the cost is to be minimized.

*Thursday, February 25, 2016 by Regine*

**Calculus**

find the two numbers whose sum of the squares is a minimum if the product of the numbers is 10.

*Thursday, February 25, 2016 by Regine*

**Calculus**

Two sides of a triangle have lengths 8 m and 13 m. The angle between them is increasing at a rate of 0.08 radians /min. How fast is the length of the third side increasing when the angle between the sides of fixed length is π/3 radians.

*Wednesday, February 24, 2016 by Kayla*

**Calculus**

f is a continuous function with a domain [−3, 9] such that f(x)= 3 , -3 ≤ x < 0 -x+3 , 0 ≤ x ≤ 6 -3 , 6 < x ≤ 9 and let g(x)= ∫ f(t) dt where a=-2 b=x On what interval is g increasing? Justify your answer. For 0 ≤ x ≤ 6, ...

*Wednesday, February 24, 2016 by Skyler*

**Calculus**

Find the area of the region bounded by the graphs of y = 2 − x2 and y = −x.Find the area of the region bounded by the graphs of y = 2 − x2 and y = −x.

*Tuesday, February 23, 2016 by nan*

**Calculus**

Find the area of the region bounded by the graphs of y = x, y = −x + 4, and y = 0. 1 2 4 None of these

*Tuesday, February 23, 2016 by nan*

**Calculus**

Find the number b such that the line y = b divides the region bounded by the curves y = x2 and y = 4 into two regions with equal area.

*Tuesday, February 23, 2016 by nan*

**college pre calculus**

A kite frame is to be made from 6 pieces of wood. The four border pieces have been cut 5 and 12. The long center piece is 13. what should the length of the cross pieces be in order to maximize the area of the kite.

*Tuesday, February 23, 2016 by Jenna*

**Calculus**

Show, using the properties of limits, that if lim x-->5 f(x)=3 then lim x---->5 x^2-4/f(x)=7

*Tuesday, February 23, 2016 by Morris*

**calculus**

The radius of a right circular cylinder is given by sqr( t + 6) and its height is 1/6 sqr(t) , where t is time in seconds and the dimensions are in inches. Find the rate of change of the volume with respect to time.

*Tuesday, February 23, 2016 by francisco*

**Calculus**

The rate at which water flows into a tank, in gallons per hour, is given by a differentiable function R of time t. The table below gives the rate as measured at various times in an 8-hour time period. t---------0-----2------3-------7----8 (hours) R(t)--1.95---2.5---2.8----4.00...

*Tuesday, February 23, 2016 by Henry*

**Calculus**

Use the graph of f(t) = 2t + 3 on the interval [-3, 6] to write the function F(x), where F(x)= ∫f(t) dt where a=3 b=x. F(x) = 2x^2 + 6x F(x) = 2x + 3 F(x) = x^2 + 3x + 54 F(x) = x^2 + 3x - 18 Honestly have no idea where to start. Do i take the derivative of that or what?

*Tuesday, February 23, 2016 by Henry*

**Calculus**

Sketch the region on paper. If it is a finite region, find its area. Round your answer to three decimal places. (If the area is not finite, enter NONE.) S = {(x,y) | x ≥ −4, 0 ≤ y ≤ e-x/2}

*Tuesday, February 23, 2016 by Kaitlyn*

**calculus**

There is a shape first a regular triangle inscribed in a circle, and inscribed in a square, inscribed in a circle, inscribed in a pentagon, etc. so polygon circle polygon circle, etc. the radius of the first circle is 1, find an equation for radius n. number 2:give an argument...

*Monday, February 22, 2016 by Andre*

**Calculus**

A particle moves along the graph of the function y= 8/3x^(3/2) at the constant rate of 3 units per minute. The particle starts at the point where x = 1 and travels in the direction of increasing x. After one hour, what is the x-value, rounded to the nearest hundredth, of the ...

*Monday, February 22, 2016 by Annonymous*

**Calculus**

How would I set this up in my calculator? Let F(x)=∫ ln(t^2) dt where a= 1 and b=3x . Use your calculator to find F"(1). I set it up and I got way the wrong answer. I got 2ln(1)=0

*Sunday, February 21, 2016 by Henry*

**Calculus**

Pumping stations deliver gasoline at the rate modeled by the function D, given by D(t)= 6t/(1+2t) with t measure in hours and and R(t) measured in gallons per hour. How much oil will the pumping stations deliver during the 3-hour period from t = 0 to t = 3? Give 3 decimal ...

*Sunday, February 21, 2016 by Henry*

**Calculus**

A particle moves along the x-axis with velocity v(t) = sin(2t), with t measured in seconds and v(t) measured in feet per second. Find the total distance travelled by the particle from t = 0 to t = π seconds. Do I have to take the integral of the equation like ∫ sin(...

*Sunday, February 21, 2016 by Henry*

**Calculus**

Use Simpson's Rule with n=10 to estimate the arc length of the curve. Compare your answer with the value of the integral produced by your calculator. x = y + y^(1/2), 1 ≤ y ≤2

*Sunday, February 21, 2016 by Kaitlyn*

**Calculus**

f(x) and g(x) are a differentiable function for all reals and h(x) = g[f(2x)]. The table below gives selected values for f(x), g(x), f '(x), and g '(x). Find the value of h '(1). (4 points) x 1 2 3 4 5 6 f(x) 0 3 2 1 2 0 g(x) 1 3 2 6 5 0 f '(x) 3 2 1 4 0 2 g '(x) 1 5 4 3 2 0

*Sunday, February 21, 2016 by Henry*

**Calculus**

Compare the rates of growth of f(x) = x + sinx and g(x) = x as x approaches infinity. f(x) grows faster than g(x) as x goes to infinity. g(x) grows faster than f(x) as x goes to infinity. f(x) and g(x) grow at the same rate as x goes to infinity. The rate of growth cannot be ...

*Saturday, February 20, 2016 by Henry*

**Calculus**

int) A man of height 1.7 meters walk away from a 5-meter lamppost at a speed of 2.9 m/s. Find the rate at which his shadow is increasing in length.

*Saturday, February 20, 2016 by Jah'sim*

**Calculus**

Which of the following functions grows the fastest as x goes to infinity? 3^x ln(x) e^4x x^10 I put e^4x but I thought that 3^x might have been it too. I know for sure that it is not ln(x) and x^10 because those grow much slower.

*Saturday, February 20, 2016 by Henry*

**Calculus**

Which of the following functions grows the slowest as x goes to infinity? x^e e^x ex they all grow the same rate. I think it is c because it does not have any exponents.

*Saturday, February 20, 2016 by Henry*

**Calculus**

Consider the plane curve y^2=x^3+1. Represent the curve as a vector-valued function. No idea how to even begin for this one. never had to change anything with a cube in it to be a vector valued function or set of parametric equations before.

*Saturday, February 20, 2016 by Ankoku*

**Calculus**

The graph of f ′(x) is continuous and decreasing with an x-intercept at x = 0. Which of the following statements is false? (4 points) The graph of f has an inflection point at x = 0. The graph of f has a relative maximum at x = 0. The graph of f is always concave down. ...

*Saturday, February 20, 2016 by Henry*

**High school calculus**

Calculate y when dy/dx = 1/(bx+5)^3

*Saturday, February 20, 2016 by Crissy*

**Calculus**

Messed this up on my last question. Given the table below for selected values of f(x), use 6 trapezoids to estimate the value of ∫f(x)dx where a=1 b=10 x 1 3 4 6 7 9 10 f(x) 4 8 6 10 10 12 16

*Saturday, February 20, 2016 by John*

**Calculus**

Internal 1/sqrt(1+x^3) from [0,2] and n=10 (a) Use the Trapezoidal Rule to approximate the given integral with the specified value of n. (b) Use the Midpoint Rule to approximate the given integral with the specified value of n. (c) Use Simpson's Rule to approximate the given ...

*Friday, February 19, 2016 by Kaitlyn*

**calculus**

A ladder 29 feet long leans against a wall and the foot of the ladder is sliding away at a constant rate of 3 feet/sec. Meanwhile, a firefighter is climbing up the ladder at a rate of 2 feet/sec. When the firefighter has climbed up 6 feet of the ladder, the ladder makes an ...

*Friday, February 19, 2016 by milly*

**Calculus**

The number of building permits in Pasco t years after 1992 roughly followed the equation n(t)=400e^.143t.what is the doubling time?

*Friday, February 19, 2016 by Agata*

**Pre-Calculus**

What are the holes of the function f(x) = (x^2 + 3x - 4)/(x^2 + 9x + 20)?

*Friday, February 19, 2016 by Anonymous*

**Calculus**

Find the length of the entire perimeter of the region inside r=5sin(theta) but outside r=1. 1=5sin(theta) theta=arcsin(1/5) r'=5cos(theta) I tried the integral between arcsin(1/5) and pi-arcsin(1/5) of (((5sin(theta))^2+(5cos(theta))^2))^1/2 which gives me 13.694 Webworks (a ...

*Friday, February 19, 2016 by Joe*

**Calculus**

Which of the following integrals cannot be evaluated using a simple substitution? the integral of the square root of the quantity x minus 1, dx the integral of the quotient of 1 and the square root of the quantity 1 minus x squared, dx the integral of the quotient of 1 and the...

*Friday, February 19, 2016 by Jana*

**Calculus**

Given the table below for selected values of f(x), use 6 trapezoids to estimate the value of x 1 3 4 6 7 9 10 f(x) 4 8 6 10 10 12 16

*Friday, February 19, 2016 by John*

**Pre-Calculus**

2. Write an equation in slope-intercept form of a line with the given parametric equations. x = 9t + 2 y = 2t – 2 answer choices: a)y=(2/9)x - (22/9) b)y=(22/9)x + (2/9) c) y=(9/2)x - (9/22) d) y=(2/5)x + (2/3) If you could show some work, because I'm pretty confused. Thank ...

*Thursday, February 18, 2016 by jewellry*

**Calculus**

dy/dx=x/(x-4) I.will have a slope field with negative slopes in quadrant I II.will have a slope field with positive slopes in all quadrants III.will produce a slope field with columns of parallel tangents

*Thursday, February 18, 2016 by John*

**Calculus**

A differential equation that is a function of x only a.will produce a slope field with parallel tangents along the diagonal b.will produce a slope field that does not have rows or columns of parallel tangents c.will produce a slope field with rows of parallel tangents d.will ...

*Thursday, February 18, 2016 by John*

**Calculus**

Which of the following definite integrals could be used to calculate the total area bounded by the graph of y = 1 – x2 and the x-axis? the integral from 0 to 1 of the quantity 1 minus x squared, dx plus the integral from 1 to 2 of the quantity 1 minus x square, dx the ...

*Thursday, February 18, 2016 by Ella*

**Calculus**

Which of the following integrals cannot be evaluated using a simple substitution? the integral of the square root of the quantity x minus 1, dx the integral of the quotient of 1 and the square root of the quantity 1 minus x squared, dx the integral of the quotient of 1 and the...

*Thursday, February 18, 2016 by Ella*

**Calculus**

a funnel of specific volume V, is to be in the shape of a right-circular cone. find the ratio of the height to the base radius if the least amount of material is to be used in its manufacture.

*Thursday, February 18, 2016 by Patrick*

**Calculus**

find the radius and center of curvature of the parabola y=x^2 -4x + 4 at any point (x,y) on the curve.draw the circle of curature.

*Thursday, February 18, 2016 by Anonymous*

**Calculus HELP TEST TOMMOROW**

The motion of an avalanche is described by s1t2 3t2, where s is the distance, in metres, travelled by the leading edge of the snow at t seconds. a. Find the distance travelled from 0s to 5s. b. Find the rate at which the avalanche is moving from 0s to10s. c. Find ...

*Wednesday, February 17, 2016 by Morris*

**Calculus**

A medicine is administered to a patient. The amount of medicine M, in milligrams, in 1 mL of the patient’s blood, t hours after the injection, is M(t)=-1/3t^2+t where 0<t<3 ￼a. Find the rate of change in the amount M, 2h after the injection. b. What is the ...

*Wednesday, February 17, 2016 by Morris*

**Calculus**

An object moves from left to right along a parabolic shaped path y=(1/4)x^2. At the point (-2,1) the speed is 1. What normal acceleration is the object experiencing at that point?

*Tuesday, February 16, 2016 by Tony*

**Calculus**

Find the specific solution of the differential equation dy/dx= 4y/x^2 with condition y(-4) = e.

*Tuesday, February 16, 2016 by John*

**Calculus**

The particular solution of the differential equation dy/dt=y/4 for which y(0) = 20 is y = 20e^-0.25t y = 19 + e^0.25t y = 20 e^0.25t y = 20^e4t

*Tuesday, February 16, 2016 by John*

**Calculus**

Sorry this is really long. Just wondering how I would do each of these A particle is moving with velocity v(t) = t^2 – 9t + 18 with distance, s measured in meters, left or right of zero, and t measured in seconds, with t between 0 and 8 seconds inclusive. The position at ...

*Sunday, February 14, 2016 by John*

**pre calculus**

Sn= 2n^2+5n IS THE SUM OF THE FIRST N TERMS OF AN ARITHMETIC SERIES. determine first 3 terms

*Sunday, February 14, 2016 by ISOSMEXY*

**Calculus**

The base of a solid is the circle x2 + y2 = 9. Cross sections of the solid perpendicular to the x-axis are semi-circles. What is the volume, in cubic units, of the solid?

*Sunday, February 14, 2016 by Belle*

**Calculus**

An elementary student kicks a ball straight into the air with a velocity of 16 feet/sec. If acceleration due to gravity is -32 ft/sec^2, how many seconds after it leaves his foot will it take the ball to reach its highest point? Assume the position at time t = 0 is 0 feet.

*Sunday, February 14, 2016 by John*