**Answer:**

hey u have any pictures that can explain it

**Answer:**

Part a)

Part b)

**Step-by-step explanation:**

**Part a)** How many gallons of water will be in the pool after 20 minutes?

we know that

Using proportion

**Part b)** How many gallons of water will be in the pool after 1 hour

we know that

1 hour = 60 minutes

Using proportion

**Elena's height **in c**entimeters **is 142.24 cm.

**Elena's height **in meters is 1**.42 meters.**

<h3>What is Elena's height in centimeters and meters?</h3>

The mathematical operations that would be used to determine the answers ae **division** and **multiplication.**

**Division** is the process of grouping a number into equal parts using another number. The sign used to denote** division **is ÷. **Multiplication **is the operation that is used to determine the product of two or more numbers.

In order to determine the **height **in centimeters, first determine how many cenitmeters make 1 inch

1 inch = 254 / 100

1 inch = 2.54 cm

Now, convert 56 inches to cm : 56 inches x 2.54 = 142.24 cm

In order to determine the **height **in meters, first find the unit of conversion of inches to meters

1 inch = 0.0254 meters

0.0254 x 56 = 1**.42 meters**

To learn more about **division, **please check: brainly.com/question/13281206

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It it called an equation. Equation consist of number, symbols, and a equal sign.

To solve, first do -2 times t and -2 times 8. Your equation would look like this after: -2T+(-16)=12. Then add 16 to each side. -2T=28. Next, divide by -2. T=-14 is your answer.