Yes, he is correct. If his car can travel 252 miles with 6 gallons, then it can travel 42 miles on one gallon. So with 42 miles per gallon, he can drive 420 miles per 10 gallons.
Answer:
Standard Deviation = 5.928
Step-by-step explanation:
a) Data:
Days Hours spent (Mean - Hour)²
1 5 61.356
2 7 34.024
3 11 3.360
4 14 1.362
5 18 26.698
6 22 84.034
6 days 77 hours, 210.834
mean
77/6 = 12.833 and 210.83/6 = 35.139
Therefore, the square root of 35.139 = 5.928
b) The standard deviation of 5.928 shows how the hours students spend outside of class on class work varies from the mean of the total hours they spend outside of class on class work.
Answer:
17) 356.4 18) 42
Step-by-step explanation:
17) you minus 954.70 and 598.30 and u get 356.4
18) you divide 189 to 4.5 and you get 42