Case studies (2016 to 2020) base on challenge poses by urbanization in south Africa​

Can anyone find the answers to the lab 2: exercise 1 bathymetric charts questions for sandy harbor so that i can check for accuracy?

Adeveloping nation's economy is based on a developed nation's economy is based on stay tuned- i may post some more questions from my study guide : )

What is the approximate circumference of the circle shown below? 12.2 cm