Grandpa's truck can hold 675 rolls of toilet paper. You think you will sell all of the toilet
paper at the remate. How much do you need to charge per roll to cover the cost of $1
per roll to grandpa, the gas in his truck, and the fee to the remate? (It is also easy.
Calculate y in the last equation, and divide by 675.)

the answer is c)8

step-by-step explanaction:

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places

1/8 is left? add a bit more info plz