Thursday

April 2, 2015

April 2, 2015

Number of results: 120

**calculas**

If f(x)=3x-1 and g(x)=2/3x+2 find: a) f(-3)+g(6) b)f(3)-g(2)
*June 5, 2011 by Genevieve *

**ap calculas**

derivative of (-x^3+3)(3x+2)^3
*March 25, 2013 by Rebecca*

**calculas**

how to find the x intercepts for f(x) = 3x^3+7x^2+3x+1
*March 23, 2009 by Sandra*

**calculas**

f(x)=ln[(1+e^2x)/(e^2x-4) find the derivative
*March 29, 2010 by Lori*

**pre -calculas**

No answer.
*April 25, 2012 by Anonymous*

**ap calculas**

derivative of (2x^3+5)cos2x^5
*March 25, 2013 by Rebecca*

**calculas **

If f(t) = square root of 7/t^5. Find f'(x) and f'(2)
*October 21, 2010 by sandy*

**Calculas**

Find the length of the curve y=ã(2x), from x=1 to x=4.
*July 24, 2012 by Drew*

**pre-calculas**

Can someone please help me?
*September 18, 2012 by ladybug*

**Calculas**

area between the curves y=4-x^2 and y=x-8
*December 21, 2014 by jessica*

**AP Calculas **

Does f(x)=(2x^3-2x)/x^3+x^2-4x-4 have any horizontal asymptotes? How can you tell?
*October 7, 2010 by Yishan shan*

**Calculas**

find the compute derivative of f(x)=sinh^2(5x)
*April 12, 2012 by ASB*

**pre-calculas**

rationalize the denominator: 5 + the sq. rt. of 3 ________________________ 4 + the sq. rt. of 3
*February 16, 2014 by Marina*

**Calculas**

how to find the x intercepts for f(x) = 3x^3+7x^2+3x+1 please show your steps
*March 23, 2009 by Sandra*

**calculas**

The function f(x)= (8x-7)e^2x has one critical number. Find it
*November 5, 2009 by jenny*

**CALCULAS**

POLAR EQUATION OF INWARDLY SPIRALING SPIRAL
*February 13, 2010 by YAMNA*

**Pre Calculas**

verify the following 1+1/csc^2x-1=sec^2x
*November 2, 2011 by Raven*

**calculas**

let p=(1,1,1), Q=(2,3 5), and R=(-1,3,1). find the area A of thr triangle with vertices P,Q, and R
*December 11, 2012 by Anonymous*

**calculas**

Solve following equations ¡¼tan¡½^(2 ) x-5tanx=-6
*March 5, 2013 by preet*

**Calculas**

Integrate: Cos^7(2x) Explanation would be helpful
*February 16, 2015 by Pen*

**Calculas**

F(X)=9 csc6(X) it is continous from -infity to infinity except what value?
*October 24, 2012 by Mohammad Al-Abdullah*

**calculas**

Write following equations in polar coordinate then graph them Y=4X
*March 5, 2013 by preet*

**Calculas**

Find the area of the region under the curve y = 12 e ^{3 x} between x = -2.6 to x =2.6
*March 8, 2014 by ryan*

**calculas**

Question # 01 Solve the inequality and sketch the solution on a coordinate line.
*March 20, 2007 by khan*

**Calculas**

I stumble a question I cannot answer please help up. Find value of limit k for equation:
*May 9, 2010 by Mike*

**pre-calculas**

Use "completing the square" to find the zeros of the polynomial. =2x squared + 6x + 5 = 0
*February 16, 2014 by Marina*

**Calculas**

find the tangent line of the following function Y=2sinx + sinx^2 at the points Pi/6,5/4
*October 26, 2014 by Bashar*

**pre-calculas**

find the LCD and solve: x+3 12x + 4 1 - 2x ____ + _________ = _______ 3-x x squared - 9 x + 3
*February 16, 2014 by Marina*

**Calculas**

Use the derivative of sinx and cosx to develop the derivatives of y=secx and y=tanx? Help would be much appreciated
*October 26, 2014 by Bashar*

**calculas**

Find the volume of the solid that is obtained when the region under the curve y=©ø¡îx+3 over the interval [5, 24] is revolved about x-axis.
*June 28, 2012 by raza*

**Calculas**

Find any critical numbers of the function. (Enter your answers as a comma-separated list.) g(t) = t sqrt6 − t , t < 13/3 I don't even know how to start out!
*February 19, 2012 by Mary*

**Applied calculas**

Let y=〖tan〗^(-1) x Rewrite it as an equation involving a trig function. Use implicit differentiation to determine an expression for y.
*April 8, 2013 by jack*

**calculas**

Find the equations for the tangent line and normal line to the curve for f(x)=(x^4)+(2e^x) at the point (0,2)?
*September 28, 2010 by john*

**Math ( calculas)**

find the intervals on which the curve y=x/(x+1)^2 is concave upward or concave downward.
*March 27, 2011 by Tina*

**Pre Calculas**

how would you varify the following sinx+sinx cot^2x=cscx
*November 2, 2011 by Raven*

**pre-calculas**

what is the function whose graph is the graph of y=ã+4, but is reflected about the the x-axis. y=
*September 19, 2012 by ladybug*

**calculas**

Consider the function f(x) = 7 xe^{-7.5 x}, 0<_x<_2. This function has an absolute minimum value equal to: which is attained at x=
*February 19, 2014 by ryan*

**Calculas**

Can someone walk me through the following questions: Partial Derivatives f(x,y) = x^7 -8y -3 find x and y f(x,y) = 7 / 5x + 4y, find x and y
*June 11, 2008 by Annette*

**pre-calculas**

write a function whose graph is the graph of y=x^2, but is shifted to the left 6 units.
*September 18, 2012 by ladybug*

**Calculas**

what is the velocity (in ft/s) of a sandbag 2.75 s after it is released from a hot-air balloon that is stationary in the air?
*December 21, 2014 by jessica*

**pre-calculas**

simplify the following complex fraction: x ____ -2 x-5 _____________________________________ x squared - 9x - 10 ____________________ x squared - 25
*February 16, 2014 by Marina*

**Calculas**

The slope of the tangent line to the graph of a function, h(t) is 7/2t The function passes through the point (5,3) Find h(4)
*March 2, 2014 by ryan*

**Calculas**

Evaluate lim x→0 10x/√(9+x)-√(9-x)
*March 16, 2013 by Radical Limits!*

**calculas**

Let f(x) = 1+3sin2x be a function, determin the amplitude and the period of the function,
*April 3, 2013 by mathews*

**calculas**

Let f(x) = 1+3sin2x be a function, determin the amplitude and the period of the function,
*April 3, 2013 by mathews*

**calculas**

Let f(x) = 1+3sin2x be a function, determin the amplitude and the period of the function,
*April 3, 2013 by mathews*

**differential calculas**

Find the instantaneous velocity and acceleration at the given time for the straight-line motion described by the equation: s= (t+2)^4- (t+2)^(-2) at t=1 Round to one decimal place.
*November 26, 2012 by Preet*

**Calculas**

Can someone please walk me through the steps for the following Partial derivatives problems: f(x,y) = x^7 - 8y - 3, find x and y f(x,y) = 7 / 5x+4y, find x and y
*June 11, 2008 by Annette*

**high school calculas**

Find the (a) the local extrema, (b) the intervals on which the function is increasing, (c) the interval on which the function is decreasing h(x)=2/x
*November 6, 2008 by pipi*

**Calculas**

I stumble a question I cannot answer please help up. Find value of lower and upper limit of k for equation: (3x^3-5)/x^2 dx = 10 limit: -k , k
*May 9, 2010 by Mike*

**Calculas**

Given f(x)=x^3−2x+5/x+4 and f′(3)=a/b, where a and b are coprime positive integers, what is the value of a+b? Details and assumptions f′(x) denotes the derivative of f(x).
*March 16, 2013 by Derivative of f(x)*

**calculas**

Suppose that the box height is h = 2 in. and that it is constructed using 193 \text{in.}^2 of cardboard (i.e., AB = 193). Which values A and B maximize the volume?
*April 7, 2014 by MEMO*

**Pre-Calculas**

I a lighthouse is 75 feet tall and boat is out at sea 40 min away, how far is the boaat from the lighthouse. I'm stump on this problem..Help!
*September 1, 2011 by Carlos*

**calculas,math**

A cylindrical can is made from tin.If it can be contain liquid inside it then what is the parameter of design if we are oblige use the minimum amount of tin.
*December 2, 2013 by mash*

**differential calculas**

The angular displacement in radians is given by: θ=8√(t^2+2) Find the angular velocity and angular acceleration at t = 0.25 s
*November 26, 2012 by Preet*

**Calculas**

Johnny is designing a rectangular poster to contain 15 in^2 of printing with a 5-in margin at the top and bottom and a 3-in margin at each side. What overall dimensions will minimize the amount of paper used?
*December 7, 2014 by jessica*

**Calculas**

Suppose that the radius r of a right circular cone of fixed height h = 30 cm is increasing at a rate 10 cm/s. How fast is the volume increasing when r = 15? Give your answer correct to two decimal places.
*October 12, 2010 by Jp*

**calculas**

A car braked at a constant deceleration of 45 ft / s2, producing a skid mark measuring 105 feet before coming to a stop. How fast was the car travelling when the brakes were first applied?
*December 4, 2011 by jordan*

**Calculas**

The profit obtained when x barbecues are sold is P(x) = 100 x − 3x^2 (lnx) dollars . Find the marginal profit when 4 are sold.
*April 4, 2014 by jake*

**calculas**

if the length is decreasing at a rate of 2 in./min. while width is increasing at a rate of 2 in./min., what must be true about area of the rectangle
*December 7, 2010 by Anonymous*

**Calculas**

Do I just put in 3 for t? A ball is dropped from a tower 550 meters above the ground with position function s(t) = 4.9t^2 + 550. What is the velocity of the ball after 3 seconds?
*December 16, 2014 by John*

**Pre-calculas Math**

how to find the exact value of: cos(9*pi/12)*cos(5*pi/12)+sin(9*pi/12)*sin(5*pi/12)
*November 4, 2012 by Jon*

**Calculas HS**

a trucker handed in a ticket at the toll booth showing that in 2hours she had covered 159 mi on a toll road with speed limit 65mph. the trucker was cited for speeding. why?
*November 6, 2008 by dt*

**Calculas HS**

show that the solution has exactly one solution in the interval x+ln(x+1)=0, 0<and equal to x <and equal to 3
*November 6, 2008 by elley*

**pre-calculas**

Find the function that is finally graphed after following transformations are applied to the graph of y=ãx in the order list 1. shift down 8 units 2. reflect the x-axis 3. reflect the y-axis
*September 18, 2012 by ladybug*

**pre-calculas**

Find the slant asymptote, if any, of the rational function. Do not graph the function. (Enter your answers as a comma-separated list of equations. If an answer does not exist, enter DNE.) f(x) = x2 − 2x + 15 _____________ x + 7
*March 10, 2013 by melanie*

**calculas**

find the perimeter of the rectangle with maximum area that can be inscribed in a semicircle of radius 2 ft. if two of its vertices are on the diameter of the semicircle and the other two are on the semicircle.
*December 7, 2010 by Anonymous*

**differential calculas**

A rocket fired at 275 m/s at 36o angle of elevation is described by: x= (275cos〖36〗^0 )t and y= (275sin〖36〗^o )t-4.9t^2 Find the velocity (magnitude and direction) at t = 8 s. Round to 1 decimal place.
*November 26, 2012 by Preet*

**calculas**

caluclas (intersection of three planes) HELP!!!? in the equations k is a real number 1.x-2y+z=4 2.x-y-z=3 3.x+y+kz=1 for what values of k does the system 1.have exactly one solution? 2.have an in finite number of solution?
*March 27, 2011 by ram*

**Calculas**

an open box is to be made from a square piece of cardboard whose sides are 19 inches long,by cutting squares of equal size from the corners and bending up the sides. Determine the size of the aquare that is to be cut out so that the volume may be a maximum.
*December 7, 2014 by jessica*

**calculas**

x and y are both variables that are differentiable with respect to t, but not to each other. however, there is a relationship between them: x^2=3y^2+7. we also know that x changes with respect to t at a steady rate of square root of 12 (dx/dt=x'= square root 12). when x is 4 ...
*December 7, 2010 by Anonymous*

**calculas**

2) A ball is hit at an angle of 36 degrees to the horizontal from 14 feet above the ground. If it hits the ground 26 feet away (in horizontal distance), what was the initial velocity? Assume there is no air resistance.
*April 6, 2011 by arun*

**Limit Calculas**

Evaluate lim->4 sin(2y)/tan(5y) Here is what I have so far. I am not sure the next steps. Can someone help me? 1. sin(2y)/(sin(5y)*cos(5y)) 2. (sin(2y)*cos(5y))/sin(5y)
*September 12, 2012 by Ryan*

**Pre-Calculas**

The voltage E of an alternating current electrical circuit can be represented by the sinusoidal function E = 220 cos( t), where E is the measured in volts and t is measured in seconds. How long does it take the alternating current to complete one full cycle?
*September 10, 2011 by Anonymous*

**differential calculas**

A point moves along the curve that has the parametric equations: x=9t^3- 〖6t〗^2 and y= 〖9t〗^3+27 x and y being in yards and t being in minutes. Find the magnitude and direction of the acceleration when t= 5/2. Round answers to 3 significant figures.
*November 26, 2012 by Preet*

**calculas**

If sin theta equals two third and zero degrees less than theta less than 90 degrees find cosine theta
*March 12, 2011 by joe*

**calculas**

find the volume of the solid generated by revolving the region about the given line. the region in the first quadrant bound above by the line y=1, below by the curve y=√(sin5x) ,and on the left by the y-axis, above the line y=-1
*December 18, 2012 by akela*

**calculas**

At time t=0 s, the radius of a circle is equal to 15 cm. The radius of the circle increases at a rate of 0.5 cm/s. The rate of change of area at t=20 s is equal to mπ cm^2/s, where m is a positive integer. What is the value of m?
*March 22, 2013 by stranger*

**calculas**

A landowner wants to fence in a rectangular area of 60000 square metres and divide it into three parts with two parallel fences both parallel to one side of the rectangle. Each part will have a different grazing crop for the herds. What is the shortest total length of fence ...
*February 19, 2014 by ryan*

**Calculas**

Find an equation of the line that is tangent to the graph of f and parallel to the given line. Function Line f(x) = 2x^2 6x – y + 4 = 0 I know i have to find derivative 1st which will be f'(x)=4x but then how to i find equation do i plug 6 in for x so 4(6) would it be 6x-24???
*February 14, 2012 by Anonymous*

**calculas(URGENT..... PLEASE....)**

1) A region is bounded by the line y = x and the parabola y = x2 - 6x + 10. What is the volume of the solid generated by revolving the region about the x-axis? would u please give the explanation with a detailed steps to the answer because i am not able to reach the final ...
*April 12, 2011 by arun*

**calculas **

If a ball is thrown vertically upward from the roof of 48 foot building with a velocity of 80 ft/sec, its height after t seconds is s(t)=48+80t–16t2. What is the maximum height the ball reaches? (my answer is 148). What is the velocity of the ball when it hits the ground (...
*October 21, 2010 by sandy*

**Calculas**

In the early 1960s, radioactive strontium-90 was released during atmospheric testing of nuclear weapons and got into the bones of people alive at the time. If the half-life of strontium-90 is 32 years, what fraction of the strontium-90 absorbed in 1965 remained in people's ...
*August 26, 2010 by Cratch*

**business calculas**

A cylindrical can is to hold 20 pie mraised to the 3rd power. The material for the top and bottom costs $10/m raised to the 2nd power and material for the side costs $8/m to the 2nd power. Find the radius r and height h of the most economical can.
*April 5, 2009 by tonya*

**calculas**

A plane flying with a constant speed of 19 km/min passes over a ground radar station at an altitude of 4 km and climbs at an angle of 25 degrees. At what rate is the distance from the plane to the radar station increasing 3 minutes later? The distance is increasing at
*October 26, 2013 by Anonymous*

**calculas**

Consider the function f(x)x^4 -32x^2 +2, -3 < or = to x < or = to 9. This function has an absolute minimum value equal to ? and an absolute maximum value equal to ?
*November 5, 2009 by jenny*

**Calculas**

A book designer decided that the pages of a book should have 1-in. margins at the top and bottom and 1 2 in. margins on the sides. She further stipulated that each page should have an area of 52 in.2. Find a function in the variable x, giving the area of the printed region
*September 8, 2013 by Hannah*

**Calculas**

A book designer decided that the pages of a book should have 1-in. margins at the top and bottom and 1 2 in. margins on the sides. She further stipulated that each page should have an area of 52 in.2. Find a function in the variable x, giving the area of the printed region
*September 8, 2013 by Hannah*

**Calculas**

A boat is pulled into a dock by means of a winch 12 feet above the deck of the boat. The winch pulls in rope at a rate of 4 feet per second. Determine the speed of the boat when there is 37 feet of rope out. ft/sec??? can someone please tell me which formula to use??? Thanks
*February 15, 2012 by Anonymous*

**Pre-Calculas 11**

a farmer wants to build two pens (one for cows, the other for horses) on land by a straight road. There is already a fence along the road and the farmer has 800m of fencing to build his fence to enclose the pens and seperate them as shown in the diagram below. what is the ...
*October 1, 2013 by Ravneet Gill*

**Applied calculas**

1. Consider the function y = xx (for x > 0). a) Why does the derivative rule for xn not apply? b) Why does the derivative rule for ax not apply? c) What are the four magic properties of logarithms? d) Take the ln of both sides. Use the properties of logarithms and implicit ...
*April 8, 2013 by jack*

**Pre Calculas**

Complete the identity sin theta / cos theta + cos theta / sin theta = ? Do you mean (sin theta/cos theta) + (cos theta/sin theta) ? That would equal tan x + cot x = tan x + (1/tan x) = (tan^2 x + 1)/ tan x I don't see any way to further simplify it. 1/(cosx)(sinx) or sin^2x+...
*June 10, 2006 by Robert*

**Pre Calculas**

A GARDENER HAS 60' of edging. She wants to use it to enclose a 120 square foot rectangular area. She does not have to use up all of the edging. what are the possible lengths that a side of the rectangle can have? Answer using interval notation. Hint: if the length of the ...
*May 23, 2013 by Laura*

**Maths/Algebra/Calculas**

A square piece of paper 20cm by 20cm has equal sized squares cut from each corner, size x. What is the formula to work out the volume of this? Also what size squares cut at each corner would produce the largest volume open top box? Thanks for any help, asap :D
*May 21, 2014 by Callum *

**calculas**

A man 5.00 ft tall approaches a street light 17.0ft above the ground at the rate of 4.00 ft/s. How fast is the end of the man's shadow moving when he is 9.0 ft from the base of the light? The end of the man's shadow is moving at a rate of_ft/s
*December 2, 2014 by jessica*

**Calculas**

A man 6.5 ft tall approaches a street light 17.0ft above the ground at the rate of 8.00 ft/s. How fast is the end of the man's shadow moving when he is 5.0 ft from the base of the light? The end of the man's shadow is moving at a rate of_ft/s
*December 2, 2014 by jessica*

**Calculas**

A box lid is to be made from a rectangular piece of cardboard measuring 72 cm by 216 cm. Two equal squares of side x are to be removed from one end, and two equal rectangles are to be removed from the other end so that the tabs can be folded to form a box with a lid. Find x ...
*December 7, 2014 by jessica*

**Applied calculas**

3. a) Write out the limit definition for the derivative of y = xx. Attempt to solve it. b) Write out the limit definition for the derivative of the inverse trig function from question 2. Attempt to solve it. c) Discuss the value of implicit differentiation. (Use questions 1 ...
*April 8, 2013 by jack*

**Calculas**

(Inventory Cost) A shopkeeper finds that the cost C of ordering and storing the latest laptop is C = 2 x + (300000 / x), where x is in the interval [1, 300]. The delivery of truck can bring at most 300 units per order. (a) Find the order size that will minimize the cost (b) ...
*December 16, 2011 by matthew*

**business calculas**

An apple orchard has an average yield of 38 bushels of apples/tree if the density is 24 trees/acre. For each unit increase in tree density, the yield decreases by 2 bushels. Letting x denote the number of trees beyond 24/acre, find a function in x that gives the yield of apples
*September 13, 2007 by sharon*