A quantity increases according to the exponential function y(t) = Yo e kt. What is the time required for the quantity to multiply by twenty? What is the time required for the quantity to increase p-fold? What is the time required for the quantity to multiply by twenty? t= (Type an exact answer. Type an expression using k as the variable.) What is the time required for the quantity to increase p-fold? t= (Type an exact answer. Type an expression using k as the variable.)