Find the product.
a. 
b. 
c. 99
d. 
e. 
b.
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Express the number in scientific notation.870,000
A. 8.7 × 105 B. 8.7 × 104 C. 8.7 × 10-4 D. 8.7 × 10-5
List the elements in the sample space of the experiment.A box contains 13 white cards numbered 1 through 13. List the sample space of the event choosing one card with a number greater than 6.
A. {7, 8, 9, 10, 11, 12, 13} B. {1, 2, 3, . . ., 13} C. {6, 7, 8, 9, 10, 11, 12, 13} D. {11}
Solve the system.x2 + y2 = 106x2 - y2 = 56
A. {(9, -5), (9, 5)} B. {(9, 5), (5, 9), (-9, -5), (-5, -9)} C. {(9, 5), (-9, 5), (9, -5), (-9, -5)} D. {(-9, -5), (-5, -9)}
Solve the problem.A plane makes a 240-mile trip against a head wind in 1 hour and 30 minutes and returns, with a tail wind of the same speed, in 1 hour. What is the speed of the wind?
A. 80 mph B. 160 mph C. 40 mph D. 200 mph