Nora wants to open a small business. Her grandfather will loan Nora $10,000 that she must repay in 4 years. Nora must also include an annual 2% simple interest amount when she repays her grandfather. What is the total amount Nora's grandfather will recieve from Nora?

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)

The height of a plant, in inches, p years after planting it is given by the polynomial function r(p) = -2p% + 270p. find the height of the plant when p = 90 years.

Two farmers pay a total rent of $140 for a pasture. the first farmer placed $4 oxen in the pasture, and the second farmer placed $30 sheep in the pasture. the farmers split the rent based on the proportion of the pasture eaten by their own animals that month. how much should the first farmer pay, if 1 ox eats as much as 10 sheep in a month?