Solve the problem.A boat heads upstream a distance of 30 miles on the Mississippi river, whose current is running at 5 miles per hour. If the trip back takes an hour less, what was the speed of the boat in still water? Give the answer rounded to two decimal places, if necessary.
A. 16.58 mph
B. 6 mph
C. 15 mph
D. 18.03 mph
Answer: D
Mathematics
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Write as a decimal. Round to the nearest thousandth, if necessary.
A. 5 B. 0.05 C. 2 D. 0.5
Mathematics
Fill in the blank with one of the words listed below.
The set of all x-coordinates of a relation is called the 
of the relation.
A. x-axis B. domain C. range D. x-intercept
Mathematics
Use the TABLE feature of a graphing utility to find the limit.
(x2 + 8x - 2)
A. 0 B. 18 C. -18 D. does not exist
Mathematics
Simplify the fraction.
A. 
B. 
C. 
D. 
E. 
Mathematics