What would be an equation and answer to the equation for the product of 6 and 3 more than k is 48

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?