Asporting goods store is having a 15% off sale on all items. which functions can be used to find the sale price of an item that has an original price of x? you may choose more than one correct answer.

ƒ(x) = x - .15x
sale = original - 15
ƒ(x) = 1.15x
sale = original - .15(original)
y = .85x

Each of the four sides of a swimming pool measures 9 meters. the pool is 5 meters deep. how much water will be needed to fill it completely? a. 45 cubic meters b. 81 cubic meters c. 225 cubic meters d. 405 cubic meters reset next

Ineed if you could explain and give me the answer you! this needs done

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e. g. 98.76543).