Pls help i don’t get it , ill mark brainlist

What is the circumference of a circle with an area of 50.24 cm²?

According to the 2008 u. s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.

Which shows a reasonable estimation for 124% of 42 using the distributive property?