Snow is accumulating on mrs. Garcias driveway at a rate of 3/4 of an inch per hour. If there were already 3 inches of snow on her driveway when she woke up at 6:00 in the morning, how many inches of snow were on the driveway when she started shoveling 90 minutes later?

4.125 inches.

Step-by-step explanation:

Based on the information provided we see that she took 90 minutes before shovelling which is 1 hour and 30 minutes or 1 1/2 hours (1.5 hours). Since we also know that the snow has been accumulating at a rate of 3/4 (0.75) inch per hour then we simply multiply these two values together to find out how much snow has accumulated.

0.75 * 1.5 = 1.125 inches

Now we can add this amount to the initial amount at 6:00 in the morning to find how many inches of snow were on the driveway when she started shovelling

3 + 1.125 = 4.125 inches.

step-by-step explanation: