Question

Question #b2c94

Answer 1

Rate of Interest 4% and Interest earned after one year $32

Explanation:

It is Simple Interest.

`I = (P N R ) / 100`

where Interest I = $16, Principal P = $800, Period N = (1/2) Year & Rate of Interest R to find.

`R = (100 * I) / (P * N)`

`R = (100 * 16) / (800 * (1/2)) = color(green)4%`

Now to find I for 1 year period.

`I = (800 * 1 * 4) / 100 = color(green)($32 )` which includes the first 6 month period interest.
.