Use dimensional analysis to answer the question. If you are driving 46 mph in a 70-kph speed zone, are you driving over the speed limit, exactly at the speed limit, or below the speed limit?
A. Under the speed limit
B. Over the speed limit
C. Exactly at the speed limit
Answer: B
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Perform the indicated operations. Write the answer using only positive exponents. Assume all variables represent positive real numbers.
A. x15/4
B. x5/4
C. 
D. 
Solve the problem.A stack of poles has 20 poles in the bottom row, 19 poles in the next row, and so on, with 5 poles in the top row. How many poles are there in the stack?
A. 195 poles B. 177 poles C. 205 poles D. 200 poles
Solve the problem.A community college raises its tuition from $379 per course to 
per course. What is the percent increase? Round to the nearest tenth of a percent, if necessary.
A. 94.3% B. 93.9% C. 5.7% D. 6.1%
Use elimination by substitution to find the solution for the following system.
A. x = 36, y = 4 B. x = 9, y = -1 C. x = -4, y = 36 D. x = 36, y = -4