A business has fixed costs of $1,275.00 each month and a cost of $4.50 for each item in it produces. Write an equation to determine the total production costs for the business if it produced x items last month.

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

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.

Jim had 3,067.48 in his checking account he wrote a check to pay for two airplane tickets. his account now has 1,845.24.