Question

answer the questions below.
note that a change can be an increase or a decrease.
for an increase, use a positive number.
for a decrease, use a negative number.
(a) leila pumped 7 gallons of water out of her pool each minute for 42 minutes. what was the total change in the amount of water in the pool?
□ gallons
(b) bob added 56 fish to his pond over a period of 7 days. he added the same number of fish each day. what was the change in the number of fish in the pond each day?
□ fish

Explanation:

Part (a)

Step1: Determine the rate and time

The rate of water being pumped out is 7 gallons per minute (a decrease, so -7), and the time is 42 minutes.

Step2: Calculate total change

To find the total change, multiply the rate by the time: $-7\times42 = -294$

Step1: Determine total change and time

The total change in the number of fish is +56 (an increase), and the time is 7 days.

Step2: Calculate daily change

To find the daily change, divide the total change by the number of days: $\frac{56}{7}=8$

Answer:

-294

Part (b)