One batch of brownies requires 3/4 cups of sugar. if camille wants to make 4 batches of brownies how many cups of sugar will she need?

Ican figure out 20 shares multiply by $117.98 =2359.6920 shares multiply by $124.32=2486.40then take 40 shares multiply by $128.48=5139.20after that i'm lost any be greatly appreciated.

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?