Solve the problem. Approximate to the nearest tenth when necessary.The area of a circle is 90 square meters. Find the radius of the circle.
A. 5.4 m
B. 16.8 m
C. 28.6 m
D. 9.5 m
Answer: A
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Solve the problem.Let the distance from home in miles of a person after t hours on a straight path be given by 
Approximate the average rate of change of s from 
to 
to the nearest tenth and interpret the result.
A. about 8.2; average speed is about 8.2 mi/hr B. about 3.7; average speed is about 3.7 mi/hr C. about 2.8; average speed is about 2.8 mi/hr D. about 2.6; average speed is about 2.6 mi/hr
Convert the mass or weight as indicated. Round the answer to one decimal place.0.45 kilograms to ounces (kilograms ? grams ? ounces)
A. 20.3 oz B. 15.8 oz C. 1.0 oz D. 9.9 oz
Evaluate the sum.
A. 21 B. 16 C. 13 D. 15
Identify the independent and dependent variables. Suppose that the speed of a car, measured in miles per hour (mph), is monitored for some short period of time after the driver applies the brakes. The following table and graph relate the speed of the car to the amount of time, measured in seconds (sec), elapsed from the moment that the brakes are applied.
A. Independent: Speed in miles per hour Dependent: Time in seconds B. Independent: None Dependent: Speed in miles per hour, Time in seconds C. Independent: Time in seconds Dependent: Speed in miles per hour D. Independent: Speed in miles per hour, Time in seconds Dependent: None