If there are 15 nickels which is $0.75 and 12 dimes which is $1.20, then that would equal $1.95 and be 27 coins.
Rate = 2 seats/11 minutes = 2/11 seats/min
Therefore the time required for s seats is

That is,
m = (11s)/2 min
When s = 16, obtain

When s = 19, obtain

Answers:

When s = 16, m = 88 min
When s = 19, m = 104.5 min
Answer:
Fraction: 23/100
Decimal: .23
Percent: 23%
Step-by-step explanation:
Because there are 23 squares shaded out of 100.