Awoman has a taco stand. she found that her daily costs are approximated by upper c left parenthesis x right parenthesis equals x squared minus 40 x plus 660c(x)=x2? 40x+660 where? c(x) is the cost in dollars to sell x units of tacos. ? a) find the number of tacos she should sell to minimize her costs. ? b) what is the minimum? cost?

Fabian got into an accident on his way to work. he had multiple fractures in his leg. his doctor advised strict bed rest for at least three months. fabian is a freelance wildlife photographer who usually works on a contract basis, and this is his primary source of income. before the accident, fabian was planning his finances. which goal of his financial plan would fabian in getting through without pay for the next three months? the goal that requires the creation of a/an would fabian get through the next three months without pay.

Find the zeros of the polynomial 5 x square + 12 x + 7 by factorization method and verify the relation between zeros and coefficient of the polynomials

Environmentalists are concerned about emissions of sulfur dioxide into the air. the average number of days per year in which sulfur dioxide levels exceed 150 milligrams per cubic meter in milan, italy, is 29. the number of days per year in which emission limits are exceeded is normally distributed with a standard deviation of 4.0 days. what percentage of the years would exceed 37 days?