Riley collected rain for several weeks in rain gauge. He collected 1.48 inches the first week, half that much the second week, and one inch the third week. How much more rain will Riley need to collect before he has five inches?

Step-by-step explanation:

Riley collected rain for several weeks in rain gauge.

He collected 1.48 inches the first week.

He collected half that much the second week. This means that he collected 0.5 * 1.48 = 0.74 inches

He collected one inch the third week. The total amount of water in inches, collected already is

1.48 + 0.74 + 1 = 3.22 inches.

To determine much more rain that Riley need to collect before he has five inches, we will subtract the amount already collected from 5. It becomes

5 - 2.22 = 1.78 inches