15. Paul is scuba diving and is 3.5 feet below sea level. He is descending at a rate of 0.5
feet per minute. If Paul is now at 12 feet
below sea level, how many minutes has he
been diving?

17 minutes

Step-by-step explanation:

This equation can be expressed as .5m+3.5=12 where m = minutes. I put this in a graphing calculator but to solve this you can

12-3.5=8.5

8.5/.5 = 17

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation: