Maria's coin collection contains three nickels for every 30 dimes. If Maria has 630 dimes, how many nickels does she have.

To complete your spring schedule, you must add calculus and physics. at 9: 30, there are three calculus sections and two physics sections; while at 11: 30, there are two calculus sections and three physics sections. how many ways can you complete your schedule if your only open periods are 9: 30 and 11: 30?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.