50,60,72 find the 8th term airthmetic and geometric sequence

Find the missing factor in exponential form 48^2=3^2 • ?

Which of the following situations represents a linear relationship? a. theresa increases the distance she runs by 0.1 miles every week. b. the volume of a box depends on the length of box. c. the amount of money in a bank account increases by 1 percent each year. d. the population of a town doubles every 5 years.

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?