21. The mean salary of twelve men is $58,000, and the mean salary of eight women is $42,000. Find the
mean salary of all twenty people.

Ten times the square of a non-zero number is eqaul to ninety times the number

If you are dealt 4 cards from a shuffled deck of 52? cards, find the probability that all 4 cards are diamondsdiamonds.

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.