Seraphina is driving two hours to visit her family. for the first hour, she traveled at a speed of 60 miles per hour. then, in the second hour, she traveled at a speed of 73 miles per hour. what is the percentage increase of seraphina's speed? if necessary, round to the nearest tenth of a percent.

percent change = (amount of change)/(original amount) × 100%

... = (73 -60)/60 × 100%

... = 13/60 × 100%

... ≈ 0.216667 × 100%

... ≈ 21.7%

Sarah's speed in the second hour was about 21.7% greater than in the first hour.

c.35

step-by-step explanation:

8+13=21

21+8=29

29+6=35

darn right!

step-by-step explanation:

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