Answer:
4/5
Step-by-step explanation:
30(.80) = 24 friends came to the party
24 / 30 = 4/5
4/5 of his friends came to the party
C = 2πr
C = 24
Replace c with 24:
24 = 2πr
Divide both sides by 2:
12 = πr
Divide both sides by π
R = 12/π
12
Plug the given values into the equation to solve.
a² - b²
(4)² - (-2)²
16 - 4
2a. 3 degreesC
2b. -3 degrees Celsius