Find the perimeter or circumference. Use ? ? 3.14 when needed.A circle whose diameter is 4.7 mi long (Round to three decimal places.)
A. 17.341 mi
B. 7.379 mi
C. 14.758 mi
D. 29.516 mi
Answer: C
Mathematics
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Solve.x4 - 89x2 + 720 = 0
A. ±3, ±4
B. ±3, ±
C. ±3, ±4
D. ±4, ±4
Mathematics
Find the area of the figure. Use 3.14 for ?. Round your answer to the nearest tenth.
A. 873.0 m2 B. 571.5 m2 C. Not enough data D. 772.5 m2
Mathematics
Determine whether the statement is true or false.log (8x2) = 2 log (8x)
A. False B. True
Mathematics
The chemical acidity of a solution is measured in units of pH: 
where 
is the hydrogen ion concentration in the solution. If a sample of rain has a pH of 3.4, how many times higher is its 
than pure water's, which has a pH of 7?
a. 
b. 
c. 7
d. 
e. 
Mathematics