Agraphing calculator displays 1.89•10^12 as 1.89e 12. how do you think it would display 1.89•10^-12? what does the e stand for?

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.