Estimate the sum or difference by rounding each number to the nearest hundred.
A. 11,800
B. 12,000
C. 11,900
D. 11,816
Answer: C
Mathematics
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Find any excluded values.
A. -5, 1, 
B. 5, 1
C. -5, 1
D. 5, 1, 
Mathematics
Solve.Jan swims at a speed of 5.2 mph in still water. The river she's in flows at a speed of 3.1 mph. How long will it take Jan to swim 2.5 mi downstream? Round your answer to the nearest tenth of an hour, if necessary.
A. 0.3 hr B. 20.8 hr C. 3.3 hr D. 1.2 hr
Mathematics
Perform the multiplication. Simplify the answer, if possible.
A. 
B. 
C. 
D. 
E. 
Mathematics
Use the properties of logarithms to find the exact value of the expression. Do not use a calculator.10log 12 - log 2
A. 1,000,000 B. 12 C. log 10 D. 6
Mathematics