Mathematics Homework Help

1. Marie purchased a cd for199.00 . The same cd went on sale for 119.00. What percent had the price decreased to the nearest percent?

2. A plant is currently 2 and 3/8 inches tall and is growing at a rate of 3/4 inches per day. After how many days will the plant reach a height that exceeds 10 inches?

3. A 12 inch ruler is divided into 48 equal parts. What is the size of each part?

4. Mike heartbeats 63 times for every 14 breaths he takes while sleeping. How many times does his heartbeat per breath?