Question

a plane flies from St. louis to chicago, a distance of 297 miles, in 45 minutes. Use the formula d=rt to find its average speed.

Answer 1

d = rt
297 = r(.75) time must be in hours.
r = 396 mph

Answer 2

use the formula d=rt where
distance, d=297 miles and
time t-45 minutes
and the rate is the unknown, r
dividing both sides of the equation by t we have
d/t=r
plugging in our known values gives 297/45 miles per hour

Answer 3

after converting minutes to hours