Write an 11 digit number that uses every digit once, and the value of the digit in the millions place is 10 times the value in the hundred thousands place

44,444,444,444 is going to be the final answer (sorry if I am wrong,) since every digit is the same digit and that the underlined digits are the value of the millions and the hundred thousands place.

Hope this helped!

Nate

gdp is the best phrase!

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).