Ihonestly don't know how to solve it me. a compact 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?

1.11%
10.56%
86.65%
100%

10.56 %

Step-by-step explanation:

Information:

mean = 4 years

standard deviation = 0.8 years

P(x < 3) = ?

using the normal distribution you must follow these steps to calculate P(x < 3):

Z=(x - μ)/(σ/)

where:

x is the raw measurement

μ is the mean

σ is the standard deviation

n is the size of sample

in this case, x = 3 , μ = 4, σ = 0.8, n = 1.

thus:

from the table of normal distribution attached, we see that our Z value is 0.1056

P(x < 3) = 0.1056

c

step-by-step explanation:

there is vertical asymptote at x = 2 and x = 0

vertical asymptote occurs at the points where the denominator is 0. so we can say that

x = 2 occurs when there is a factor (x-2) in the denominator, and

x = 0 occurs when there is a factor "x" in the denominator

thus, the denominator of the equation would have "x * (x-2)", this is option c only. that's the correct answer.

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3