Question

Can someone help? 20 points!

Answer 1

a)

V =
`(4)/(3) \pi r^(3)`

905 =
`(4)/(3) \pi r^(3)`

2715 = 4π r³

`(2715)/(4\pi ) = r^(3)`

216 = r³

`\sqrt[3]{216} = \sqrt[3]{r^(3) }`

6 = r

b)

`i = ((p1)/(p2) )^{(1)/(n)} - 1`

`i = ((200,000)/(3,000) )^{(1)/((2012-1945)} - 1`

`i = ((200)/(3) )^{(1)/((67)} - 1`

i = (66.67)⁰¹⁵ - 1

i = 1.065 - 1

i = 0.065

i = 6.5%

Answers: r = 6, i = 6.5%