1.The surface area of the ballon is increasing at a rate of 452 m2 per minute.
2. The area of the ink blot is increasing at a rate of 15.7 cm2 / sec.
3. 4°C
4. 22
5. 21.7 seconds
6. a. t = 1.23 seconds
b. 16000 n m-2
7. Maximum volume = 28 520 cm3
8. H = 136 mm and L = 271 mm
