How do you add/subtract in scientific notation? Answer in a sentence.

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).

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