Answer:
A sports car traveling at 78 miles per hour, will travel a total of 351 miles in 4 1/2 hours
Explanation:
78 miles are traveled in 1 hour, if the sports card travels in the same speed during those 4 1/2 hours then:
78 × 4 = 312
78 ÷ 2 = 39
312 + 39 = 351
hope this helps! :)