I would like to create a rectangular vegetable patch. The fencing for the east and west sides costs $4 per foot, and the fencing

The fee Jack Duffy charges per mile is $0.278, making option B correct.

Detailed explanation:

Given:

Jack Duffy's travel distance = d = 12,568 miles

Fixed costs amount to = $1,485.00

Variable costs amount to = $2,015.75

Let the cost per mile charged by Jack Duffy be = $x

According to the provided information

Total cost = Fixed costs + Variable costs

Thus, Total cost = $1,485.00 + $2,015.75

This equates to Total cost = $3,500.75

Therefore,

The cost Jack Duffy charges per mile =

Hence, x = $0.278 per mile

This leads us to conclude that Jack Duffy’s charging rate is $0.278 per mile, confirming option B.

If rational roots exist, they would be factors of the constant term (9) over factors of the leading coefficient (12).

a) The hypothesis states that the mean is different from 0.5025 and has been rejected. b) The p-value computed is 0. c) A confidence interval is established as 0.50456 < u < 0.50464. The hypothesis testing is based on a given standard deviation (s.d.) of 0.0001, a sample mean of x = 0.5046 from a sample size of n = 25. The two-sided alternative and significance level of 0.05 were assumed. A Z-score was calculated to show that the hypothesis is rejected since the mean differs from 0.5025.