What’s the vocab word “correlation coefficient” mean?

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?