Two persons are to run a race, but one can run 11 meters per second, whereas the other can run 5 meters per second. If the slower runner has a 72-meter head start, how long will it be before the faster runner catches the slower runner, if they begin at the same time?
?
A. 10.5 sec
B. 12 sec
C. 11.5 sec
D. 13 sec
E. 14.40 sec
Answer: B
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Round off the approximate number as indicated.2090 2 significant digits
A. 2000 B. 2100 C. 290 D. 2200
Graph the function by starting with the graph of the basic function and then using the techniques of shifting, compressing, stretching, and/or reflecting.f(x) = 3|x| 
A. 
B. 
C. 
D. 
Perform the indicated operation(s). Simplify if possible.
- 
A. 
B. 5
C. 
D. 
Is x a negative number? Explain.
A) Not necessarily; x is a variable that may represent a positive number or negative number or zero. B) Yes, because there is a positive sign before x. C) No, because there is no positive sign before x. D) No, because there is no negative sign before x. E) No, because negative means opposite and the opposite of x is y.