Express the number in scientific notation.0.0000004
A. 4 × 10-6
B. 4 × 10-8
C. 4 × 10-7
D. 4 × 10-9
Answer: C
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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 6 hours, how many miles did he drive at the reduced speed?
A. 70 miles B. 60 miles C. 55 miles D. 80 miles
Determine whether the relation defines y as a function of x. Give the domain.y = 
A. Not a function; domain: 
B. Not a function; domain: 
C. Function; domain: (-?, ?)
D. Function; domain: 
Solve.Two angles are said to be supplementary if their sum is 180°. If one angle measures 
degrees, find the measure of its supplement.
A. 
B. 
C. 
D. 
Solve the problem.Richard's team wants to plant 285 trees in 3 months. How many trees per month do they need to plant?
A. 105 trees B. 190 trees C. 98 trees D. 95 trees