04/29/17

find the volume of the solid formed by revolving the region bounded by the graphs of y=x^3 y=1 x=2 about the y-axis
Please help!!!
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04/24/17

Two observers are on different sides of a mountain. From a point on level ground, the first observer measures the angle of elevation to the peak of a mountain t
The second observer is also at ground level but is 200 meters further away from a point at ground level directly below the peak than the first observer. The second observer measures the angle of... more
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04/22/17

use the midpoint rule with the value
Use the Midpoint Rule with the value of n=4 to approximate the integral  pie/2  cos^2 x... more
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04/19/17

Determine the half life of the substance that decays from Ao to A in time t
Ao= 49 A=20 t=20 hours the answer is 15.5 hours but how do I solve for h when its in the exponent?
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04/19/17

I can't figure this out
A barrel with a diameter of 32 inches has a height of 4 feet. It is partially filled with water and when the barrel is lying on its side, the water has a depth of 8 inches. Find the volume of the... more
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04/19/17

ABCDE is a regular pentagon. Sides CB and EA have been extended to meet at P. If each side of the pentagon is a units long, find BP in terms of a.
geometry regular polygon extended  
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04/18/17

∑n k=1 (24k(k-1)/n^7
Use the summation formulas to rewrite the expression ∑n k=1 (24k(k-1)/n^7 without the summation notation.
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04/11/17

a semicircle with a perimeter of window is constrained to be 6 metres but able to admit greatest amount of light
Your father is in the process of building a new bungalow house for the whole family. Since you are an engineering student, he asked you to help in the designing of the house. He wants the windows... more
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04/03/17

System of Equations word problem
During one game for the Phoenix Suns, Steve Nash scored 39 points on 17 field goals. How many of these field goals were 2-pointers and how many were 3-pointers?
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04/02/17

plane areas in rectangular coordinates (please help)
Find the area bounded by the curve: y = x(x-1)^2, the line y = 2, and the y - axis
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03/29/17

Optimization problem, Please Help!!
I am asked to design a fuel tank for a fighter jet that will hold 300 liters of jet fuel. The shape of the tube is a cylinder with two hemispheres attached to each end. The side wall (the cylinder... more
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03/26/17

Trigonometry Bearing Question
You are on a flight out of Tampa Airport. On the first leg of the journey, you head at a bearing of N 75⁰ Eand fly 315 miles. From there, the pilot changes bearings to N 35⁰E and you travel an... more
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03/25/17

In triangle RST, U lies on TS with TU:US= 2:3. M is the midpoint of RU. TM intersects RS in V. Find the ratio of RV:RS.
The answer is 2:7
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03/23/17

Express the area A of the rectangle as a function of x
I am stuck on this ?calculus? question.  I don't know how to use the graphing calculator, so if you kindly answer this question can you please explain step by step, even with the graphing... more
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03/16/17

Find the partial fraction decomposition of the rational expression with prime quadratic factors in the denominator 5x^4-7x^3-12x^2+6x+21/(x-3)(x^2-2)^2
Find the partial fraction decomposition of the rational expression with prime quadratic factors in the denominator 5x^4-7x^3-12x^2+6x+21/(x-3)(x^2-2)^2
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03/15/17

Bearing problems & Airplane problems
A man travels 6 miles due east, and then 4 miles northwest. What is the direction and distance back to his starting point?    - I want to understand how to set this up using a picture & then... more
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03/10/17

Find the coordinates of the foci, ends of major and minor axes, ends of the latus rectum
5𝑥2 + 2𝑦2 = 100
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03/09/17

Area between two curves
y=xsqrt(x-2) , y=-xsqrt(x-2) , x=4    In the answer booklet it says y2 = x2 (x-2) . I dont understand why you are squaring the y ? 
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02/28/17

Evaluate the integral. (Use C for the constant of integration.)
∫ 9x/x4+x²+6 dx
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02/24/17

Calculus 2: Work Done by Pumping a Water Tank
A water tank in the shape of a hemispherical bowl of radius 4 m is filled with water to a depth of 2 m. How much work is required to pump all the water over the top of the tank? (The density of the... more
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02/21/17

find a real number between -2 3/4 and -2 3/8
 i need some help with this question
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02/20/17

Trigonometry- Area of Quadrilateral
Find area of quadrilateral ABCD with AB= 12cm, BC=10 cm, and CD=10 cm, angle B = 108 degres, and angle C = 132 degrees.
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02/20/17

calculus 2
Find the volume of the solid generated by revolving the region bounded by the graphs of the equations and/or inequalities about the indicated axis.   x = 1/y    x = 0  y = 3   y = 4; the y-axis
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02/13/17

elimination problem
- x+14y=3  x+14y=4 my problem I don't know how they are getting the answer of1/2 from 14.1/4
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02/12/17

Cylindrical shells
Use the method of cylindrical shells to find the volume V of the solid obtained by rotating the region bounded by the given curves about the x-axis.x + y = 7, x = 16 − (y − 3)^2
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