Working together, two ants named Aran and Beatrice can build an ant hill in 10 hours. Aran and Charlie can build the ant hill in 12
hours. Beatrice and Charlie can build the ant hill in 15 hours. How
long, in hours, will it take to build the ant hill if Aran, Beatrice, and
Charlie work together?

Can somebody me out with this question

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered