HELP!!!!!!!!!!!!!!

This page lists questions and answers that were posted by visitors named HELP!!!!!!!!!!!!!!.

Questions

The following questions were asked by visitors named HELP!!!!!!!!!!!!!!.

Express the radius r of a sphere as a function of the volume V it encloses.

Find coordinates for two points that belong to the plane 2x+3y+5z=15. Show that the vector [2,3,5] is perpendicular to the segment that joins your two points. Explain why [2,3,5] is perpendicular to the plane.

The value of [cosx, sinx]• [cos(a + x), sin( a + x)] does depend on the value of a, but does not depend on the value of x. Explain why.

when I have .5=(0.91)^t, could i do log(.5)/log(0.91) ?

The probability that John wins a game is 4/5, and, independently, the probability that Meghan wins is 9/11. What is the probability that Meghan wins and John loses the game?

Answers

The following answers were posted by visitors named HELP!!!!!!!!!!!!!!.

what does (a,b,c) is normal to the plane mean? specifically, what do u mean by "normal"?

do I multiply them?

more specifically, do I multiply 1/5 and 9/11?