Brownsville, texas, boasts being the southernmost international seaport and the largest city in the lower rio grande valley. ben supple, an importer in brownsville, has just received a shipment of peruvian opals that he is pricing for sale. he paid $150 for the shipment. if he wants a 75% markup, calculate the selling price based on selling price. then calculate the selling price based on cost. (again show all work)

What are the domain and range of the function? f(x) = -4 (sqrt)x

Find the x-intercepts of the parabola withvertex (1,1) and y-intercept (0,-3).write your answer in this form: (x1,if necessary, round to the nearest hundredth.

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.