Write 4.91 in expanded form.
?
A. 
B. 
C. 
D. 
Answer: A
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Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sin ? = - 
, 
< ? < 2?Find sin 
.
A. - 
B. - 
C. 
D. 
Answer the question.There is a distributive property for multiplication with respect to addition: a(b + c) = ab + ac. Is there a distributive property for division with respect to addition? If so, state the property.
A. No. B. Yes. a/(b + c) = a/b + a/c
Perform the indicated operation and, if possible, simplify. Assume that all variables represent positive real numbers. (2 + 
)2
A. 7 + 4
B. 7 + 2
C. 5 + 4
D. 4 + 4
Solve the problem.Use the formula R = log
, where the magnitude of an earthquake on the Richter scale is based on I, the measurement of a seismic wave, and I0, the measurement of a seismic wave of a level zero earthquake with the same epicenter. An earthquake was recorded which was 2,511,886 times more powerful than a reference level zero earthquake. What is the magnitude of this earthquake? (Round to the nearest tenth.)
A. 5.4 B. 6.4 C. 0.6 D. 14.7