Statistics statisticians use the formula σ = √v to calculate a standard deviation σ, where v is the variance of a data set. find the variance when the standard deviation is 15.

8

step-by-step explanation:

this is a subtraction problem.

10 - 2 = 8

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.