Answer:
$21
Step-by-step explanation:
starting money: 51
cost of each book = 3
total books bought = 10
3*10 = $30 spent on books
51-30 = $21 left
Ayana have left 21$
10x3$=30$
Then,30$-51$=21$
Hope it helps
..
24.9π
Curcle Area=πR^2
A= πR^2 × 140°/360°
A= π×8^2 × 0.389 =~ 78.15
