Suppose a normal distribution has a mean of 18 and a standard deviation of 4. A value of 24 is how many standard deviations away from the mean?

A: -3

B: -1.5

C: 1.5 The answer I believe is correct :)

D: 3

step-by-step explanation:

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

the answer is d

hope this