Acompact disc is designed to last an average of 4 years with a standard deviation of 0.8 years. what is the probability that a cd will last less than 3 years?

10.56%

Step-by-step explanation:

Step 1: Use the z formula  

The z-formula is

P(z < -1.25)  

Step 2: Use a p chart to find -1.25

-1.25 on a p chart is .1056

there is a 10.56% chance that a CD will last less than 3 years.

The answer is 10.56%

left 3, up 4

step-by-step explanation:

just count the values of x & y of the vertex of the graph and see how many units in the x and y direction will get you from the f(x) graph to the f(x) graph

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: