Perform the indicated calculation. Express your answer using scientific notation.(0.0000000064)(160,000,000,000)
A. 1.02 × 104
B. 1.02 × 10-3
C. 1.02 × 102
D. 1.02 × 103
Answer: D
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Solve using the percentage formula.6% of 8800 is what number?
A. 528 B. 628 C. 5280 D. 6280
Write the following as a sum using powers of 10 to show place value.0.300398
A. 0 ? 10-1 + 3 ? 10-2 + 0 ? 10-3 + 0 ? 10-4 + 3 ? 10-5 + 9 ? 10-6 + 8 ? 10-7 B. 0 ? 101 + 3 ? 100 + 0 ? 10-1 + 0 ? 10-2 + 3 ? 10-3 + 9 ? 10-4 + 8 ? 10-5 C. 0 ? 100 + 3 ? 101 + 0 ? 102 + 0 ? 103 + 3 ? 104 + 9 ? 105 + 8 ? 106 D. 0 ? 100 + 3 ? 10-1 + 0 ? 10-2 + 0 ? 10-3 + 3 ? 10-4 + 9 ? 10-5 + 8 ? 10-6
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.csc ? = - 
, tan ? > 0Find cos(2?).
A. - 
B. 
C. 
D. 
Solve the problem.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. 435 mph B. 525 mph C. 550 mph D. 605 mph