Express 21 as a decimal number as a sum of multiple of power of 3.

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis. y = 7ex, y = 7e^-x, x = 1; about the y-axis

Y= 4x + 3 y = - 1 4 x - 5 what is the best description for the lines represented by the equations?