If 10% of 50% of a number is 30 less than one- quarter of the number what is it?

Can someone me with this problem . show your work .

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

How to find the exponential function y=ca^x, with points (1,2) and (2,1)