There are 30 actors in the school play. 60% of the actors are girls. How many actors are boys?

Np4=12np2 with clear explanation.

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.