Solve the problem. Round your answer to the nearest tenth, if necessary.A jet plane traveling at a constant speed goes 1200 mi with the wind, then turns around and travels for 1000 mi against the wind. If the speed of the wind is a constant 50 mph, and the total flight took 4 hours, find the speed of the plane.
A. 550 mph
B. 435 mph
C. 525 mph
D. 605 mph
Answer: A
Mathematics
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Evaluate the factorial expression.
A. 4!
B. 
C. 4
D. 1
Mathematics
Use the percent formula, A = PB: A is P percent of B, to solve.What number is 60% of 18?
A. 108 B. 1.08 C. 1080 D. 10.8
Mathematics
Solve the problem.The marriage rate in a certain country in 1990 was 0.89%, and there were about 369,000 marriages that year. Use the model M(t) = M0(1 + r)t, with a constant marriage rate and t = 0 corresponding to 1990 to estimate the year in which the number of marriages will be 1 million.
A. 2113 B. 2002 C. 2362 D. 2103
Mathematics
Perform the division.
A. x2 - 9 B. x + 9 C. x - 81 D. x + 81
Mathematics