Suppose you measured the diameter of a tree trunk to be 5 cm. the actual diameter can vary by at most 0.4 cm, due to the error in measuring a non-flat surface. write an absolute value inequality for the range of acceptable diameters and solve the inequality.
a. |d − 5| ≤ 0.4; 4.6 ≤ d ≤ 5.4
b. |d + 5| ≤ 0.4; −5.4 ≤ d ≤ −4.6
c. |d + 0.4| ≤ 5; −5.4 ≤ d ≤ 4.6
d. |d − 0.4| ≤ 5; −4.6 ≤ d ≤ 5.4

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent and the median? 40 25 8 36 18 15 24 27 43 9 12 19 22 34 31 20 26 19 17 28

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?