La compañía a puede instalar butacas de un teatro en 10h. La compañía B en 15h. El propietario del teatro quiere que las butacas queden instaladas en menos de 8h. Si las compañías trabajan juntas, podrán lograrlo?

Which value of c would make he following expression completely factored? 8x+cy

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4? r^2. write your answer in scientific notation.