Find the mean for the given sample data.The local Tupperware dealers earned these commissions last month:
What was the mean commission earned? Round your answer to the nearest cent.
A. $3420.39
B. $3426.39
C. $4282.98
D. $3807.10
Answer: B
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Solve the problem.A plane flying a straight course observes a mountain at a bearing of 30.1° to the right of its course. At that time the plane is 
from the mountain. A short time later, the bearing to the mountain becomes 40.1°. How far is the plane from the mountain when the second bearing is taken (to the nearest tenth of a km)?
A. 14.6 km B. 7.8 km C. 5.2 km D. 12.8 km
Simplify.i8
A. -i B. 1 C. -1 D. i
Solve. If necessary, round percents to the nearest tenth, dollar amounts to the nearest cent, and all other numbers to the nearest whole.One day 16 teachers were sick with the flu. If this were 80% of the total number of teachers, how many teachers were there altogether?
A. 200 teachers B. 12,800 teachers C. 1,280 teachers D. 20 teachers
Perform the indicated operation by first converting the numbers to scientific notation. Write the answer in scientific notation.
A. 8 × 104 B. 64 × 105 C. 8 × 10-4 D. 64 × 10-5