In melanie's styling salon, the time to complete a simple haircut is normally distributed with a mean of 25 minutes and a standard deviation of 4 minutes. the slowest quartile of customers will require longer than how many minutes for a simple haircut?

(a) 3(n+1)/4 minutes
(b) 26 minutes
(c) 25.7 minutes
(d) 27.7 minutes

(D) 27.7 minutes

Step-by-step explanation:

The slowest quartile starts at the 75th percentile:

The z-score for the 75th percentile is approximately 0.675. Z-score is given by:

Where 'μ' is the population mean and 'σ' is the standard deviation

At the 75th percentile, the time for a haircut is:

Therefore, the slowest quartile will require at least 27.7 minutes for a haircut.

b. 6

step-by-step explanation:

we are given the table representing an exponential function.

we can see from the table that, as x is increasing, the value of y is increasing in the power of 6.

i.e. the following relation is obtained,

x = 1, y = 6

x = 2, y = 36 =

x = 3, y = 216 =

x = 4, y = 1296 =

x = 5, y = 7776 =

so, the geometric series obtained is .

thus, the common ratio is given by = = 6.

hence, the common ratio is 6.

step-by-step explanation:

what does 'mandy have ben 780 bottle caps. ' mean?