Answer
(a) $10,000$ bills
(b) $\$200,000$
Work Step by Step
(a)
We know from Exercise #49a that 100 bills are 0.43 inches tall. Therefore, a pile 43 inches tall would have 100 times as many bills:
$100$ bills$*\frac{43}{0.43}=100*100=10000$ bills
(b) We know from part (a) that we have 10000 bills. If each bill is worth $\$20$, then the sum total is:
$10000~bills*\$20=\$200,000$