Find the extrema of the function y = x^4 - 8x^2 on the
interval[-1,4]
when x = the function has an absolute maximum value

when x = the function has an absolute minimum favlueof

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.