Complete the chart :)

What is the number 321,000,000 in scientific notation? also what is the number? ?

The revenue each season from tickets at the theme park is represented by t(c)=5x. the cost to pay the employees each season is represented by r(x)=(1.5)^x. examine the graph of the combined function for total profit and estimate the profit after four seasons

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?