HELPMEEEEEEEEEEEEE

If each slice of pie has a central angle of 45 degrees, that means that each slice is 45/360= 1/8 of the total pie. Now all we need to do is find the area of the pie and take 1/8 of it. Since the diameter is 9, the radius is 4.5 which means the area is (4.5)^2 * pi= 20.25pi. So your answer is 20.25pi/8= 2.53125pi= 7.952 or you can round to 8.

Hope it helps!

For this question, it basically asks how much money you put into each CD to get the same amount of money back through different interest rates.

The rates respectively are (1.01), (1.02)...(1.05) and for 5 years, it would be $X * (1.01)^5, $X * (1.02)^5, ... , $X * (1.05)^5. 

You can set up the equation A(1.01)^5= B(1.02)^5= C(1.03)^5= D(1.04)^5= E(1.05)^5 and A+B+C+D+E= $1,000,000.

See if you can work something out with this.

Hope it helps!

If you get paid 18$ per month and you earn 180$, the means it took $180/ $18= 10 months.

Hope it helps!

All good.

That's incorrect, the 25 is the measurement of the angle, not the side.

Since we know the height of the prism is 6, all we need to know is the area of the base. Solving for the last angle of the base, we get 65 degrees. tan(65)= x/4 where x is the other leg of the triangle. X is roughly 8.58 so the area of the base of the triangle is 4 * 8.58/2= 17.16. The volume of the prism is area of base times height, so the volume of this prism is 17.16 * 6= 102.9 units^3.

*You'll need to know trig for this problem

Hope it helps!

Isn't that the same thing though...

Ok the questions is solvable now. Doing the same method above, there are x blue files, 2x yellow files, and x-3 red files. So 4x-3= 88 and x= 22. If there are 22 blue files then there are x-3= 19 red files. 

Hope it helps!

a. 9 C 6= 84. This is the easiest one.....This is how many ways she can invite six of the nine friends with no restrictions.

Let's call the amount of blue files x, so the amount of yellow files is 2x and the amount of red files is 3+x. The sum of these is 4x+3= 85. Solving for x, we get the amount of blue files as 20.5 which means there are x+3= 23.5 red files.

Since you can't have part of a file, I think there is something wrong with your question, the numbers don't add up correctly.

Hope it helps!