The quantity of an element is decaying over time such that the amount of material at any time is given by the function D(t) = 1900(0.9)3t. Write an equivalent function
of the form D(t) = ab'.

Sandy is upgrading her internet service. fast internet charges $20 for installation and $52.45 per month. quick internet has free installation but charges $57.45 per month. part 1 out of 2 complete the equation that can be used to find the number of months after which the internet service would cost the same. use the variable x to represent the number of months of internet service purchased.