A nurse has 12 cm ^ 3 of 10 % concentration of a certain drug. She will add an amount of a 5% concentration to achieve an 8% concentration of this drug . How much of the 5% should be added?

Volume of a cylinder with a radius of 13 in and height of 30 in

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.

W-16=-12 solve each one step equation plz