Can any of you guys help me?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

The graph shows the distance kerri drives on a trip. what is kerri's speed?

Hurrya vegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide if one bag of gravel covers 9 square feet how many bags are needed to cover the path