The average age of CEOs is 56 years. Assume the variable is normally distributed. If the SD is four years, find the probability that the age of randomly selected CEO will be between 50 and 55 years old.

the probability that the age of randomly selected CEO will be between 50 and 55 years old is 0.334

Step-by-step explanation:

Assuming that the age of randomly selected CEOs is normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - µ)/σ

Where

x = age of randomly selected CEOs.

µ = mean age

σ = standard deviation

From the information given,

µ = 56 years

σ = 4 years

We want to find the probability that the age of randomly selected CEO will be between 50 and 55 years old. It is expressed as

P(50 ≤ x ≤ 55)

For x = 50,

z = (50 - 56)/4 = - 1.5

Looking at the normal distribution table, the probability corresponding to the z score is 0.067

For x = 55,

z = (55 - 56)/4 = - 0.25

Looking at the normal distribution table, the probability corresponding to the z score is 0.401

Therefore,

P(50 ≤ x ≤ 55) = 0.401 - 0.067 = 0.334

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation: