See the attachments for the answer :)
Answer:
0.5hrs
Step-by-step explanation:
Let the speed downhill be ,
Speed uphill is . We are told than speed uphill is the speed on flat ground. Therefore the speed on level ground will be .
From this info, we can obtain the actual speed, on level ground as:
speed, distance and time have the relation so to obtain time to cover 45miles:
Hence it takes 0.5hrs to cover 45miles on flat ground.
She drove 585 miles
60 =1 hour
60*9=540
9*65=585
The x is 176.54 cm.
i use pythagorean thearem