Is the cubic root of 81 rational or irrational ?

Paul bakes raisin bars in a pan shaped like a rectangular prism. the volume of the pan is 252 cubic inches. the length of the pan is 12 inches, and its width is 10 1/2 inches. what is the height of the pan? enter your answer in the box. will give brialist and pointsss !

The life (in hours) of a magnetic resonance imagining machine (mri) is modeled by a weibull distribution with parameters β = 2 and δ = 370 hours. (a) determine the mean life of the mri. (round your answer to 2 decimal ) determine the variance of the life of the mri. (round your answer to 1 decimal ) what is the probability that the mri fails before 250 hours? (round your answer to 4 decimal places.)

Ramona had money to spend during a visit with her grandparents. she recorded how much money she had left y, in dollars, after each day x. how much money did ramona originally have to spend?