-19 ÷ 7 = -2.7142857142857143
Use distance = rate x time
18 minutes is 3/10 of an hour.
So the distance to the store is:
d = 20*(3/10) = 6 miles
The distance downhill is the same, 6 miles. So:
6 = (60)t
6/60 = t
1/10 = t
Where t is the time it took to go back home. So t is .1 hour (6 minutes).
To calculate average speed we use the formula:
average speed = total distance/ total time
average speed = (6+6)/(.3 + .1) = 12/(.4) = 30
So her average speed for the entire trip is 30 mph (miles per hour).
Answer: 4.1
Step-by-step explanation:
The answer is <span>1. 5,444.76 cm3.
</span>
Paint can is a cylindrical shape. The volume of the cylinder is:
V = π * r² * h
We have:
π = 3.14
d = 17 cm
r = 17/2 = 8.5 cm
h = 24 cm
V = 3.14 * (8.5)² * 24
V = 5,444.76 cm³