Match each given function with the description of its graph. Not all tiles will be used. Tiles:

* y-intercept at (0,1) graph approaches 0 as x increases
* y-intercept at (0,2) graph approaches positive infinity as x increases
* y- intercept at (0,1) graph approaches positive infinity as x increases
* y-intercept at (0,2) graph approaches negative infinity as x increases
* y-intercept at (0,2) graph approaches 0 as x increases

Boxes:

* y= 3^x
* y= (1/4)^ x
* y= 2(1/2)^x

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14

cut 138 centimeters off

step-by-step explanation:

250-112 = 138

irst, find the z score of a score of 80. this is given by the formula z = (x-u)/o, where x is the score, u is the mean, and o is the standard deviation. this gives

z = (80-78)/12 = 1/6 = .1667

now, find what percentile a z score of 1/6 correlates to in the normal distribution.

a z score of 1/6 = .1667 is equivalent to the 56.36th percentile of the distribution. so the probability a score is over this is 1-.5636 = .4364

the mean of a sample mean is equal to the original mean. however, the standard deviation of a sample mean is equal to the original standard deviation divided by the square root of n (sample size). so the new standard deviation is 12/sqrt(16) = 3.

the new z score is 80-78/3 = 2/3 = .667. this is equivalent to the 74.86th percentile. so the probability that the mean will be greater than this score is 1-.7486 = .2514.