12
1/2 * x =6
6/ (1/2) = x
X=12
Answer:
18 feet
Step-by-step explanation:
The difference in elevations is ...
-12 -(-30) = -12 +30 = 30 -12 = 18 . . . feet
The ray is 18 feet above the whale.
To turn a number to a percent, multiply by 100 = 600%
1)<span>
960 square feet</span>
2) B. 25 cm ^2The area of a regular pentagon can be found using the formula.

s=side length
A≈960 square feet
The apothem of a square is half of the side length. 2.5*2=5. 5^2 = 25cm^2