05/07/17

TRIGONOMETRY

PYTHAGOREAN THEOREM Right angle triangle: C=25 A=x B=4x . My textbook says x=6.06 but I think it's wrong, please explain how I work this out.  I know the formula is A^2=C^2-B^2 thanks.   

05/07/17

find the coordinates of the other endpoint of the segment, given its midpoint and one endpoint

midpoint (9,0) endpoint (12,3)

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?

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

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.

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

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?

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

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

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

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

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

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 ? 

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

02/21/17

find a real number between -2 3/4 and -2 3/8

 i need some help with this question

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.

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

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

Conditional: If point M is the midpoint of segment AB, then point M is between points A and B. .

Conditional: If point M is the midpoint of segment AB, then point M is between points A and B.For the given conditional statement, determine which of the following option(s) has a truth value of... more

02/01/17

write an equation for the nth term of the geometric sequence 3,-24,192

 find nth term

rabbit bought a shirt for $35.70. This price was 15% off the original prove. What was the original price of the shirt?

 Rabbit bought a shirt for $35.70.  This price was 15% off the original price. What was the original price of the shirt ?

02/01/17

in a bag of marbles,7 are green, 20 are red and 8 are blue what percentage of the marbles are green

I GOT A HOMEWORK QUESTION AND I'M  USUALLY SO GOOD AT MATHS ESPECIALLY PERCENTAGES BUT THIS ONE JUST KNOCKED ME TO THE GROUND I'M NOT SURE IF I WANT THE ANSWER BUT I NEED TO KNOW THE WORKING OUT... more

01/31/17

i need help.statistics

Given that P(A or B) = 2/3, P(A) = 0.67, and P(A and B) = 1/3, find P(B).

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