Apopulation has a mean of 60 and a standard deviation of 2. how many standard deviations above the mean is a data value of 66?
a. 2.5
b. 2
c. 3
d.2.5
*i have no idea why a and d are the same*

Adriveway is 60-feet long by 6-feet wide. the length and width of the driveway will each be increased by the same number of feet. the following expression represents the perimeter of the larger driveway: (x + 60) + (x + 6) + (x + 60) + (x + 6) which expression is equivalent to the expression for the perimeter of the larger driveway? a) 2(x + 66) b) 4x + 33 c) 4(x + 33) d) 4(x + 132)

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

If a is a nonzero real number then the reciprocal of a is