A radioactive substance decays at a rate of 10% per hour. Write an equation that can be used to find the percent of the substance left after 3 hours.

1/3(x-10)=-4 solve for x with steps

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer