Dimensional Analysis Answers

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Alina is able to swim at a rate of about 2.5 miles per hour. Talia is able to swim at a rate of 1.8 meters per second. Which statement comparing the two swimmers is accurate?1 mile 1,609 meters

Question illustration
A
Alina swims about 0.7 miles per hour faster than Talia.
B
Talia swims about 0.7 miles per hour faster than Alina.
C
Alina swims about 1.5 miles per hour faster than Talia.
D
Talia swims about 1.5 miles per hour faster than Alina.
3

A particular beach is eroding at a rate of 4 centimeters per year. A realtor converts this rate to millimeters per day. Which expression, when evaluated, results in the correct units and numerical value?

A
StartFraction 4 centimeters Over 1 year EndFraction times StartFraction 10 millimeters Over 1 centimeter EndFraction times StartFraction 1 year Over 365 days EndFraction
Option A
B
StartFraction 4 centimeters Over 1 year EndFraction times StartFraction 1 millimeters Over 10 centimeter EndFraction times StartFraction 1 year Over 365 days EndFraction
Option B
C
StartFraction 4 centimeters Over 1 year EndFraction times StartFraction 1 centimeter Over 10 millimeters EndFraction times StartFraction 365 days Over 1 year EndFraction
Option C
D
StartFraction 4 centimeters Over 1 year EndFraction times StartFraction 10 millimeters Over 1 centimeter EndFraction times StartFraction 365 days Over 1 year EndFraction
Option D
6

Which expression can be used to convert 80 US dollars (USD) to Australian dollars (AUD)?1 USD = 1.0343 AUD1 AUD = 0.9668 USD

A
80 U S D times StartFraction 0.9668 U S D Over 1 A U D EndFraction
Option A
B
80 U S D times StartFraction 1.0343 U S D Over 1 A U D EndFraction
Option B
C
80 U S D times StartFraction 0.9668 A U D Over 1 U S D EndFraction
Option C
D
80 U S D times StartFraction 1.0343 A U D Over 1 U S D EndFraction
Option D
9

How many square inches are in 60 square feet?

A
5 square inches
B
72 square inches
C
720 square inches
D
8,640 square inches

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