Solve.A boat goes 560 miles downstream in the same time it can go 490 miles upstream. The speed of the current is 3 miles per hour. Find the speed of the boat in still water.
A. 105 mph
B. 48 mph
C. 42 mph
D. 45 mph
Answer: D
Mathematics
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Simplify the expression. Use positive exponents. Assume variables represent nonnegative numbers.(-2x2y)4
A. 16x6y4 B. -8x2y4 C. 16x8y4 D. -8x2y
Mathematics
Find the probability.The table lists the eight possible blood types. Also given is the percent of the U.S. population having that type.
Let E be the event that a randomly selected person in the U. S. has type B blood. Let F be the event that a randomly selected person in the U. S. has RH-positive blood.Find P(F|E).
A. 0.818 B. 0.340 C. 0.720 D. 0.107
Mathematics
Write the number in scientific notation as it would be displayed on a calculator.0.000000307013
A. 3.07013E7 B. 3.07013E-6 C. 3.07013E6 D. 3.07013E-7
Mathematics
Simplify.8[-8 + 6(-6 + 5)]
A. -70 B. 16 C. -112 D. 12
Mathematics