Use front end rounding to estimate the sum or difference. Then find the exact answer to the problemSheri wanted to know the total number of hours she worked this week. Her time card indicated the following hours: Monday, 5.74 hours; Tuesday, 9.75 hours; Thursday, 4.85 hours. How many hours has Sheri worked?
A. Estimate: 21 hours; exact: 21.34 hours
B. Estimate: 19 hours; exact: 21.34 hours
C. Estimate: 20 hours; exact: 20.34 hours
D. Estimate: 21 hours; exact: 20.34 hours
Answer: D
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Write a formula for the nth term of the arithmetic sequence. Use the formula to find the indicated term of the sequence.a = 6, d = -9;
Find a15.
A. an = 6 - 9n, a15 = -120 B. an = 15 - 9n, a15 = -48 C. an = 15 + 9n, a15 = -120 D. an = 15 - 9n, a15 = -120
Use a calculator to find ? to the nearest tenth of a degree, if 
and
?
with ? in QIII
?
__________
Fill in the blank(s) with the appropriate word(s).
Solve the problem.A promotional deal for long distance phone service charges a $15 basic fee plus $0.05 per minute for all calls. If Joe's phone bill was $56 under this promotional deal, how many minutes of phone calls did he make? Round to the nearest integer, if necessary.
A. 8 min B. 2 min C. 820 min D. 1420 min
Find the slope of the line through the given points.(8, -8) and (8, -6)
A. m = 0
B. undefined
C. m = - 
D. m = - 