Use the algebraic procedure explained in section 8.9 in your book to find the derivative of f(x)=1/x. use h for the small number. (hint: simplify f(x+h)-f(x) by finding a common denominator and combining the two fractions).

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?

Sam is picking fruit from a basket that contains many different kinds of fruit. which set of events is independent?