Help me pls and pls show work

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Why do interests rates on loans to be lower in a weak economy than in a strong one

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e.g. 98.7654). x f(x) 0 1 2 3