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. 6 mph
B. 18.03 mph
C. 15 mph
D. 16.58 mph
Answer: B
Mathematics
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Mathematics
Find the quadrant that contains the terminal side of angle ?.sec ? < 0 and tan ? > 0
A. I B. II C. III D. IV
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Solve.In a lab experiment, 600 ml of salt water was added to 1.82 L of water. Later 230 ml of the solution was drained off. How many ml of the solution still remain?
A. 436.2 ml B. 552 ml C. 2190 ml D. 2438.2 ml
Mathematics
Evaluate the expression for the given replacement values.3xy2 - 6 for x = 3, y = 4
A. 1290 B. 426 C. 66 D. 138
Mathematics