Need help please

I think it's a.)

Step-by-step explanation:

It says that they already started off with $400 and raise $80 a day, and d stands for the number of days.

It's basically $80 a day being added on to the $400 that was already collected.

So it's 80d+400=7,600

i think that you should ask google for the answer to that problem because if we don't know it google does

r and t.

both are 64 degrees.