Which pulley system will allow the armchair to be lifted with the least amount of effort?

a. system a
b. system b
c. system c
d. system d

pll 25 points

According to the passage, which of these is true about gray water systems? a) gray water systems use plants that require less water. eliminate b) gray water systems require the use of less fossil fuels. c) gray water systems reduce the amount of fresh water used. d) gray water systems reduce the amount water used by shower heads.