How do I simplify this and put it in scientific notation?

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

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 of the following circles have their centers on the x-axis? check all that apply.