First draw out the picture it will help. Then you can see that you want the opposite segment of the angle, which leads you to use a sine. So you have 20sin30 or 20(1/2) or 10ft.
Answer:
15
Step-by-step explanation:
Hi. The difference between terminating decimals and different from repeating decimals is:
Terminating decimals is a decimal that ends. It is a decimal with an infinite number of digits.
Repeating decimals have a digit or a block of digits that repeat over and over again.
Hope this helps.
Take care,
Diana
ANSWER
307½ gallons of water
EXPLANATION
The volume of the rectangular swimming pool is

where l=25ft and w=20½ ft.
when it is filled to a depth of 4½ ft ,then the height is , h=4½ ft.
We substitute these values into the formula to get:


If one cubic foot of water is 7½ gallons, then 2306.25 cubic feet will be

We need 307.5 gallons of water to fill the pool.