A gym charges 600 dollars per year to join, and the gym expects they will have 3,000 members when charging this fee. The gym plans to increase its yearly membership fee in increments of 20 dollars. But, for each 20 dollar increase, they expect to have 30 less members. Let x be the number of increases and f(x) be the amount of revenue. The function is f(x)=(600+20x)(3000−30x).
What total membership fee would result in the highest possible total revenue for the gym?
A
The membership fee will be $100 per year.

B
The membership fee will be $760 per year.

C
The membership fee will be $1,300 per year.

D
The membership fee will be $1,950 per year.

Select the point that is a solution to the system of inequalities. y< =-x+3 y=x^(2)-3x

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.

Solve for x and select the correct answer