Please help with this

Can someone me with this problem . show your work .

Raymond just got done jumping at super bounce trampoline center. the total cost of his session was $43.25 . he had to pay a $7 entrance fee and $1.25 for every minute he was on the trampoline. write an equation to determine the number of minutes (t) that raymond was on the trampoline.

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.