21^2/0.219 = 2013.69863
2 significant figures are the 20, so the answer is 2000
5,600
8000*.10(y)
8000*.10(3)
8000*.3
5600
Answer:
$14233.12
Step-by-step explanation:
10,000(1+.04/1)^1(9)
If #peaches = x and #plums = y we can write the following equations:
x+y=15
0.89x + 0.39y = 8.85
and x and y are whole numbers.
converting the first to x=15-y and plugging it into the second, you get
0.89(15-y) + 0.39y = 8.85 =>
13.35 - 0.89y + 0.39y = 8.85 =>
4.5 = 0.5y =>
y = 9
so x = 15-9 = 6
She bought 9 plums and 6 peaches.
