PLEASE HELP Describe the location of the point having the following coordinates. Abscissa and ordinate have the same sign

a) Quadrant II or Quadrant IV
b) Quadrant I or Quadrant III
c) Quadrant I or Quadrant IV
d) Quadrant II or Quadrant III

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

Ihave trouble finding the nth term of a linear sequence

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?