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John left his house in Irvine at 8:35 am to drive to a meeting in Los Angeles, 45 miles away. He arrived at the meeting at 9:50. At 3:30 pm, he left the meeting and drove home. He arrived home at 5:18.
(a) What was his average speed on the drive from Irvine to Los Angeles?
(b) What was his average speed on the drive from Los Angeles to Irvine?
(c) What was the total time he spent driving to and from this meeting?
(d) John drove a total of 90 miles roundtrip. Find his average speed. (Round to the nearest tenth.)
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