the hydrogen atom contains a proton mass 1.67*10^-24g. An oxygen atom has a mass of about 2.66*10*-23g. About how many times as great is the mass of an oxygen atom than the mass of a hydrogen atom? Show your work.

At a lunchron, guests are offered a selection of five different grilled vegetables and four different meats. in how many waya could one choose three vegetables and two meats?

Sam makes his sales calls according to a pattern. he travels either north or south depending on the calendar. some of his past trips were as follows: on february 17, april 24, june 10, september 19, and november 3 he drove north. on february 28, may 25, august 22, november 20, and december 18, he drove south. describe sams' pattern. in which direction will sam drive on oct4 and oct 24?

Given abcd ac=38 and ae=3x+4 find the value of x