Answer:
Step-by-step explanation:
1) a) r = 7 cm
= 4*3.14 * 7 * 7
= 615.44 cm²
b) r= 8.4 cm
Surface area = 4*3.14*8.4*8.4
= 887.04 cm²
a) r = 6 cm
= 3 * 3.14 * 6 * 6
= 339.12 cm²
(-1, -2)
Explanation:
4
12+8 = 20
20/5 = 4
69