How would i solve this equation for mass (m)?
f = (gm^2)/d^2

i know the answer is m = sqrt [(fd2)/g]
i'm just not sure how to get to that answer

(i had originally posted this in the physics section but hope i could get more out of this in the math section.)

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?