Answer:
5cm
Step-by-step explanation:
volume = πr²h
225π = π × r² × 9
225/9 = r²
r = √225/9 = 15/3 = 5cm
Answer:
Step-by-step explanation
6n - 6 = 2 (n+1)
Simplify 2 (n+1)
6n - 6= 2n +2
Move all terms related to n to the left side of the equation
4n -6 =2
Move all terms not related to n to the right side of the equation
4n =8
Divide each term by 4 then simplify
n=2
Answer:
A
Step-by-step explanation:
Given the exponential function
f(t) = 228 ← where t is time in years
Substitute t = 20 into f(t), that is
f(20) = 228 × = 228 × 0.60268.... ≈ 137 → A