Mathematics

How do you go from this to that

Initial equation: V = pi/3 [0.4h]^2 h Final equation: V = 4pi/75 h^3 What happened in the middle? Can anyone please explain how you get form the initial equation to eh final equation. Its just algeb

Stats problem. test tomorrow

The probability that one 3 foot section of wire is defective is 0.002.If someone has 450 feet of wire then what is the probability they will have 3 or more 3 feet sections that are defective? dont re

What is the hypotenuse

if the legs are 3 and 6, then wat is the hypotenuse. i dont need any of that a+b=c b.s. Ill figure that out myself.-the hypotenuse is 6.7 (1dp)-3 squared = 9 6 squared = 36 9+36=45 The square root of

These are just examples.. please help!! ;-; (exponential growth)

1. you deposit $1500 in an account that pays 5% interest yearly. how much money do you have after 6 years? 2. if i have $500 in my account after 4 years of investing at 2.5% per year, how much money

2 Continuous Probability questions

----------------------------------------… 1. An angle x is chosen at random from from the interval 0 Find the probability p that the numbers sin²x, cos²x and (sin x)*(cos x) are not the lengths of the

Calculus question about related rates

Heres the question: The top of a 10-foot ladder is sliding down a wall at a rate of 12 feet per second. How fast is the base of the ladder sliding away from the wall at the instant when the top of the

Help how do I find the area of the shaded region for the standard normal curve

-1.96 all the way to 1.96 is not shaded but the ends of the curve are shaded--1.96 to +1.96 = 95% of the whole curve The shaded tails are 100 - 95 = 5%

Where does the graph have horizontal tangent lines? f(x) = (sin(2x))+x? Calc help

Find all points on the graph of the function f(x) = (sin(2x))+x at which the tangent line is horizontal. help?-When the derivative -0 2*cos(2*x)+1=0 cos(2x)=-1/2 x=Pi*n +/- Pi/3-Tangent lines are hor

Multivariable Chain rule

Let F(x,y), m(a,b), and n(a,b) be differentiable functions. If f(a,b) = F(m(a,b), n(a,b)), find ∂²f/∂a² and ∂²f/∂a∂b. Im having a bit of trouble finding these two. Whats the proper way to take the s

How do you simplify x^3y^2(y^2x^3)

i got x^6y^4. is that right?-Correct!-You got it!

The music department has 8 trumpet players and 11 saxophone players available. How many ways can the request

The Saturday Night Jazz Band asked the music department of the community college to furnish a group of 3 trumpet players or a group of 4 saxophone players for prom weekend.-8 choose 3 + 11 choose 4 A

In how many ways can the 10 children be selected

The Hewitt Elementary School PTA plans to use students in their next program.They want 5 children from MRs. Perrys PE class to give a PE activity demonstration; 2 children from MRs. Browns class, a bo

If f(x)=3sin(x)+4x^x, find f′(2)

If f(x)=3sin(x)+4x^x, find f′(2)-f(x) = 3sin(x) + 4x^x f(x) = 3cos(x) + 4(x^x)(1+lnx) f(2) = 3cos(2) + 16(1+ln2) ≈ 25.84191

Quadratic inequalities? (graphing)

How would you find the vertex and x-axis points of this equation so you could graph it? Please make it detailed and easy to understand. I dont really understand graphing :P y>-2(x-5)(x+1)-You can sim

The sum of the infinite geometric series 30 - 6 + 6/5 - 6/25 ..

a. 24 b. 30 c. 36 d. 25 isnt it 30?-S = a + ar + ar^2 + ar^3 + . . . = a / (1-r) , for |r| Here we have a = 30, r = -1/5 S = 30 / (1+1/5) = 30 / (6/5) = 30 * 5/6 = 25 Mαthmφm-the sum of and infi