7. The population of Lorne Akins is 485. 30% are grade 7's, 30% are grade 8's. How many grade 9's are at Lorne Akins?

Find the volume of the largest rectangular box in the first octant with three faces in the coordinate planes and one vertex in the plane x + 2y + 3z = 15.

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

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.