Installation : $1.98
carpet : $71.91
in all : $73.89
70% is the same as 70/100 then we simplify by taking off one zero of each number 7/10 and we can't divide it any more so the answer is 7/10
54 miles
using the formula
speed =
=
= 12 mph
continuing at 12 mph then
distance = speed × time = 12 × 4.5 = 54 miles
Eddie: $10-3=$7
Marsha: $8+$3=$11