Ineed !
q: in 2013 , the united states postal service charged $0.46 to mail a letter weighing up to 1 oz. and $0.20 per ounce for each additional ounce. which function would determine the cost, in dollars, c(z), of mailing a letter weighing x ounces where z is an integer greater than 1 ?

possible answers: a. c(z) = 0.46 + 0.20, b. c(z) = 0.20z + 0.46, c. c(z) = 0.46( z - 1 ) + 0.20, d. c(z) = 0.20 (z - 1 ) +0.46

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297

Put the equation in slope intercept form by solving for y

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?