Find answer to he distance from kenya's house to her job is 18 miles. one morning she left her house at 7: 15 a. m. she traveled at the rate of 45 miles per hour for 20 minutes, but to traffic she had to slow down to 20 miles per hour. at what time did kenya arrive at work? show your work

The total distance is given as 18 miles
 she traveled at 45 miles per hour for 20 minutes

20 minutes = 20 / 60 = 1/3 of an  hour

45 miles per hour x 1/3 of an hour = 15 miles driven

18 total miles - 15 miles driven = 3 miles left

she then drove at 20 miles per hour

20 miles per hour / 60 minutes per hour = 1/3 mile per minute = 1 mile every 3 minutes

3 miles x 3 minutes = 9 minutes to drive the final 3 miles

20 minutes + 9 minutes = 29 total minutes to drive to work

she left at 7:15

7:15 + 20 minutes = 7:35 am she arrived at work

Exponential function