Can someone explain to me how to set up abd use a sign chart in calc? Like for example, if I have the derivative of something and i need to know where its positive or negative, or if i need to know if its increasing or decreasing. Or if i need to know what intervals its moving tp the right and in and which ones is it moving to the left in?

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

Ateacher has $80 to buy workbooks. each work book cost $3. if she buys as many workbooks as possible, how much money does she have leftover? a) $2 b) $4 c) $6 d) $8

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%