R(t) = 4t
A(r) = π(r^2)
a) A(t) = A[r(t)] = π[r(t)]^2 = π[4t]^2 = 16π(t^2)
b) t = 4,
A(4) = 16*3.14*(16)^2 = 12,861.44
Answer:75 children
Step-by-step explanation: Let the number of children will be x, so the number of adults will be 215-x
Making equation: 3x+5(215-x)=925
3x+1075-5x=925
-2x=925-1075
-2x=-150
x=75
Answer:
24/7
Step-by-step explanation:
Answer: It should be g > 9
Step-by-step explanation:
-Solve:


So, Therefore, the result is g > 9