Rewrite the number as a product of a whole number and a power of 10.3900
A. 39 ? 102
B. 392 ? 10
C. 39 ? 103
D. 39 ? 101
Answer: A
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Solve the problem.Tom Quig traveled 240 miles east of St. Louis. For most of the trip he averaged 60 mph, but for one period of time he was slowed to 20 mph due to a major accident. If the total time of travel was 8 hours, how many miles did he drive at the reduced speed?
A. 130 miles B. 120 miles C. 140 miles D. 115 miles
Express the radical in simplified form. Assume that all variables represent positive real numbers.
A. y2 - 7
B. 
C. 7y2
D. 
Simplify.5000 ? 1100
A. 55,000,000 B. 550,000 C. 55,000 D. 5,500,000
Solve the problem.An airplane leaves Los Angeles for Denver at a speed of 450 mph. Thirty minutes later, a plane going from Denver to Los Angeles leaves Denver, which is 850 miles from Los Angeles, at a speed of 470 mph. When they meet, how far are they from Denver?
A. 277 mi B. 55 mi C. 319 mi D. 111 mi