Perform the indicated operation or operations. Simplify, if possible.
- 
+ 
A. -1
B. 1
C. 
D. 
Answer: B
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Solve the problem.V = 
?r3, where r is the radius, in centimeters. By approximately how much does the volume of a sphere increase when the radius is increased from 2 cm to 2.1 cm? (Use 3.14 for ?.)
A. 5.2 cm3 B. 5.0 cm3 C. 0.3 cm3 D. 4.8 cm3
Use properties of logarithms to evaluate the expression.1000log108
A. 1024 B. 512 C. 24 D. log 512
Write the number in words.2,400,844
A. two million, forty thousand, eight hundred forty-four B. two million, four hundred thousand, eight hundred forty-four C. two million, four thousand, eight hundred forty-four D. twenty-four thousand, eight hundred forty-four
Solve the problem.In simplified form, the period of vibration P for a pendulum varies directly as the square root of its length L. If P is 3.5 sec. when L is 49 in., what is the period when the length is 25 in.?
A. 2.5 sec B. 50 sec C. 10 sec D. 12.5 sec