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) lena pumped 6 gallons of water into her pool each minute for 18 minutes. what was the total change in the amount of water in the pool?
\bgallons
(b) deon removed 24 fish from his pond over a period of 3 days. he removed the same number of fish each day. what was the change in the number of fish in the pond each day?
\bfish

Explanation:

Part (a)

Step1: Identify the rate and time

Lena pumps 6 gallons per minute, and the time is 18 minutes. Since it's an increase, we use a positive number.

Step2: Calculate total change

Total change = rate × time = \( 6 \, \text{gallons/minute} \times 18 \, \text{minutes} \)
\( 6 \times 18 = 108 \)

Step1: Identify total change and time

Deon removed 24 fish over 3 days. Since it's a decrease, we use a negative number.

Step2: Calculate daily change

Daily change = total change ÷ number of days = \( \frac{-24 \, \text{fish}}{3 \, \text{days}} \)
\( -24 \div 3 = -8 \)

Answer:

The total change in the amount of water is 108 gallons.

Part (b)