Which graph models the function f(x) = −2(3)^x? exponential function going through point 0, negative 2 and ending down on the right exponential function going through point 0, 2 and ending down on the right exponential function going through point 0, 2 and ending up on the right exponential function going through point 0, negative 2 and ending up on the right

Standard deviation is best described as

A. the difference between the number and the mean.

B.the sum of the differences between the numbers and the mean.

C. the square root of the sum of the differences between the numbers and the mean squared and divided by the number of terms.

D.the square root of the mean divided by the Z-Score times the sum of the numbers.

Step-by-step explanation:

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk