8. The volume of air occupied inside a room is 405 m?. The cost of carpeting the room at Rs. 55/m is Rs. 4455. Find the cost of painting 4 walls of the room at Rs. 25.50/m².​

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1

Astudent showed the steps below while solving the inequality |x-4|< 1 by graphing.