Question

Mr. Adams has a block of ice that is beginning to melt. It currently weighs 60 grams, but is losing 7% of its weight each hour. How much will it weigh after 8 hours?

Answer 1

$$m(t)=m_0(1-r)^t$$

$m$ in grams, $t$ in hours.

Given $m_0=60\ g, r=0.07$

$$m(8)=60(1-0.07)^8\approx33.575 (g)$$

A block of ice will weigh 33.575 grams after 8 hours.