Solve the problem.Bill kept track of the number of hours he spent exercising each week. The results for four months are shown below. Find the mean number of hours Bill spent exercising per week. Round your answer to two decimal places. 
A. 7.02
B. 7.62
C. 7.84
D. 7.41
Answer: D
Mathematics
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Graph.7x2 + 4y2 = 56 
A. 
B. 
C. 
D. 
Mathematics
For a full wave rectified sine wave, what is the average current if IPK = 420 mA?
a. 105.0 mA b. 133.6 mA c. 210.0 mA d. 231.9 mA e. 267.4 mA
Mathematics
Solve the problem. Round to an appropriate number of significant digits.The total number of cars sold at a used car lot for the years 1996 and 1997 was 1376. From 1996 to 1997 the number of cars sold declined by 158. How many cars were sold in 1996?
A. 755 B. 773 C. 745 D. 767
Mathematics
Find the angle between v and w. Round to one decimal place, if necessary.v = 2i + j + 2k and w = i + 2j + 3k
A. 63° B. 27° C. 53.3° D. 48.2°
Mathematics