I’ve post this like 5 times no one has answered it please help hehe

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?