Question

Can someone help? 20 points!

Answer 1

a)

   V = $\frac{4}{3} \pi r^{3}$

905 = $\frac{4}{3} \pi r^{3}$

2715 = 4π r³

$\frac{2715}{4\pi } = r^{3}$

216 = r³

$\sqrt[3]{216} = \sqrt[3]{r^{3} }$

 6 = r

b)

$i = (\frac{p1}{p2} )^{\frac{1}{n}} - 1$

$i = (\frac{200,000}{3,000} )^{\frac{1}{(2012-1945}} - 1$

$i = (\frac{200}{3} )^{\frac{1}{(67}} - 1$

i = (66.67)⁰¹⁵ - 1

i = 1.065 - 1

i = 0.065

i = 6.5%

Answers: r = 6, i = 6.5%