2 There are some chairs in the art room. Mrs. Lopez brings in
16 more chairs. Now there are
42 chairs. How many chairs were
in the room at the start?

it's both, now can you answer my most recent question?

the answer is:

the correct option:

b.

to solve the problem, we need to remember how to operate to simplify exponential expressions using the logarithms.

we are given the equation:

then, using placing logarith with base 7 on both sides of the equation, we have:

so, rounding the obtained result to two decimal places (nearest hundreth), we have:

hence, we have that the correct option:

b.

have a nice day!