Question #49ce5

1 Answer
Meave60
Sep 26, 2016

Yes. The car is exceeding the speed limit of 55.0 mi/h.

Explanation:

Identify the equalities needed to answer the question.

#"1 mi=1609.34 m"#

#"1 h=3600 s"#

Multiply #"28.8 m/s"# by the equalities so as to cancel meters and seconds.

#28.8 cancel"m"/cancel"s"xx(1"mi")/(1609.34cancel"m")xx(3600cancel"s")/(1"h")="64.4 mi/h"# (rounded to three significant figures)

The car is exceeding the speed limit of 55.0 mi/h.

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