Solve the problem.Jay drove 390 kilometers at the average rate of 78 kilometers per hour. How long did the trip take?
A. 4 hr
B. 
hr
C. 5 hr
D. 6 hr
Answer: C
Mathematics
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Simplify and reduce to lowest terms.
- 
+ 
A. 1
B. 
C. 
D. -1
Mathematics
Write the number in scientific notation.86.223
A. 8.6223 × 101 B. 8.6223 × 10-2 C. 8.6223 × 102 D. 8.6223 × 10-1
Mathematics
Solve the following problem. Be sure to make a diagram of the situation with all the given information labeled. ? How long should an escalator be if it is to make an angle of 26° with the floor and carry people a vertical distance of 18 feet between floors? Apply the rules regarding the use of significant digits when determining your answer. Round to the nearest foot. ? Length of escalator = __________ ft
Fill in the blank(s) with the appropriate word(s).
Mathematics
Evaluate.cos-1
A. 
B. 0
C. 
D. ?
Mathematics