The life of Sunshine CD players is normally distributed with a mean of 4. 1 years and a standard deviation of 1. 3 years. A CD player is guaranteed for 3 years. We are interested in the length of time a CD player lasts. Find the probability that a CD player will break down during the guarantee period. Sketch the situation. Label and scale the axes. Shade the region corresponding to the probability

they charge the same amount at 20 minutes.

step-by-step explanation:

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.