Doug C.

03/08/19

First, express the cost of the fencing as an equation in terms of L. Be sure to list restrictions. Then determine the dimensions of L and W that minimize the cost.

A rectangular area of 1000 ft2 is to be enclosed by a fence in combination with a pre-existing wall. The wall forms the North boundary and is 150 ft. in length. You may use as much (or as little)... more

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Math Algebra 1 Calculus

03/07/19

Help with system of equations.

Consider the following system of equation: 3𝑥 − 4𝑦 = 0 and 4𝑥 − 5𝑦 = 𝑘 where k is a constant Real Number. Solve the system for (x,y) in terms of k. Do not replace the constant k with a numerical... more

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Calculus Precalculus Limits Of A Function

03/05/19

Calculus please somebody help me with this!!

Let f(x)=(x)/(x+6). Find the values of x where f'(x)=5The greater solution is x=The lesser solution is x=

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Calculus Mathematics Derivatives

03/05/19

2e^2x-e^x=0 solve the equation

I've got a test tomorrow and the only question left I can't wrap my head around is this one, all help is greatly appreciated. (This is a derived function set to zero by the way, looking for maximum... more

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Calculus

03/04/19

let f(x) = square root (x) -5 lim as h goes to 0. f(8+h)-f(8) / h .EVALUATE

let f(x) = square root (x)-5 then lim as h goes to 0. f(8+h)-f(8) / h

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Math Calculus

03/04/19

Air is being pumped into a spherical ball, at the rate of 10cm^3/min. Find the rate of change of the radius of the ball, when the radius is 15cm.

I've tried working it out using the formula for volume, but I am not getting the answer I want. I am hoping someone could possibly show me with the work and the answer along with it.

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Trigonometry

03/03/19

To measure the height of the cloud cover at an airport, a worker shines a powerful spotlight upward at an angle 85deg from the horizon.

Question: To measure the height of the cloud cover at an airport, a worker shines a powerful spotlight upward at an angle 85deg from the horizon. An observer 500m away measures the angle of... more

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Calculus Simpson's Rule Midpoint Rule

02/28/19

Use the Trapezoid Rule, the Midpoint Rule, and Simpson's Rule

Use the Trapezoidal Rule, the Midpoint Rule, and Simpson's Rule to approximate the given integral with the specified value of n. (Round your answers to six decimal places.)integrate the integral... more

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Calculus

02/25/19

graphs of sinusoidal functions

The London Eye is the world's largest ferris wheel. It has a diameter of 450 feet and completes one revolution every 30 minutes. It rotates slowly enough that people can get on and off the ride as... more

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Chemistry Precalculus Word Problem

02/25/19

The radioactive element potassium-42 decays exponentially, and follows A(t)=Aoe^-0.56t

a) What is the half-life?b) If you start with 1000 mg of potassium-42, how much will be left after 12 hours?c) If you start with 1000 mg of potassium-42, how long until only 200 mg remains?

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Math Algebra 2

02/25/19

2x +3y = 9 , (6y/x) -x/y = -1, how do I solve this?

Im a student, sorry for dumb question, im not good at math

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Calculus

02/25/19

Draw sign charts for f’ and f” . Where Is f increasing, decreasing, concave up, concaving down? At which x-values do relative minima, maxima, and inflection points occur?

Draw sign charts for f’ and f” . Where is f increasing, decreasing, concave up, concaving down? At which x-values do relative minima, maxima, and inflection points occur?a) f(x)= x^3-6x^2-15x+46b)... more

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Calculus

02/24/19

Explanations and Help on my study sheet

Hello!! I'm trying to create a study sheet, If someone could give and explain the correct answers, It would be very helpful for me and appreciated!gyazo.com/0dccabaac7b9ed649b06d394ce306ff5(sorry... more

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Math Algebra 1

02/22/19

Part( after increase) is $32.20 Rate of increase is 15% The base is

I truly need help with this math problem, I’m trying to find several ways to arrive at my answer. But I’m coming up short can someone show me a way.

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Math Calculus Pre Calculus

02/20/19

math 31 calculus question. Need help!!!!

A light airplane flies north at 250 km/hr. At the same time, another airplane starts from an airport 140 km north of the first airplane and is travelling east at 300 km/hr. What is the closest... more

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Calculus

02/19/19

Calculus Question????

Find the particular solution to y " = 3sin(x) given the general solution y = −3sin(x) + Ax + B and the initial conditions and .

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Calculus

02/19/19

Calculus Honors Help???

If and if y = 1 when x = 0, then when y = 3, x is equal to

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Calculus Optimization Help

02/19/19

optimization question

Maximize the volume of a rectangular prism whose base area is given by the polynomial 36+15x-3x^2 and whose height is 20x-90.

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Calculus

02/19/19

Help on calc 1 homework

Use implicit differentiation to find an equation of the tangent line to the curve at the given point.x^2/3 + y^2/3 = 4(−3√3,1)(astroid)

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Calculus Logarithms

02/18/19

Log rule confusion during : Log = 1 + Log

Log5(x2) = 1 + Log5(6) Uses rule a=logb(ba) to get log5(x2) = log5(30) x2= 30 x = square of 30 There is nothing online about “1 + logarithms” and when there is they expotentate. Why is this rule... more

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