Answer:
tHE ANSWER IS d
Step-by-step explanation:
B. 1
C. 2
D. 3
E. 4
Answer:140 cm^2
Step-by-step explanation:
The answer is D. 140 cm². I think the circumference of the balloon means the circumference of the biggest circle. So the 21=2πr². While the surface area of a sphere is S=4πr². So the S≈140 cm².
y≥0
3x+2y≤18
6x+7y≤42
Answer: