He would travel 67 1/2 miles in an hour.
Answer:
B
Step-by-step explanation:
5/1 is not equal to 6/2 or 7/3 or 8/4
First, find the mean. You'll need it to compute the variance.
The variance of the sample is then computed with the formula
The standard deviation is the square root of the variance, so
Answer:
63
Step-by-step explanation:
Since a1=7 and the question is to find a9, you just have to multiply 7 and 9 which is 63