Use spherical coordinates. Evaluate e underroot x2 + y2 + z2 dV, where E is enclosed by the sphere x2 + y2 + z2 = 81 in the first octant.

It takes jonas 7 1/4 minutes to run the mile. it takes mario 8 5/12 to run the mile. how much faster is jonas than mario? 5/6 minute 1 1/3 minutes 1 1/6 minutes 1 1/2 minutesi will give points and brainlest

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry