Water flows at a rate of 0.060 m3/s in a 0.12-m-diameter pipe that contains a sudden contraction to a 0.06-m-diameter pipe. (a) Determine the pressure drop across the contraction section.
(b) How much of this pressure difference is due to losses and
(c) how much is due to kinetic energy changes

the answer should be a)

answerblank(1); fixed interval; blank(2) fixed ratio;

answer: marginal utility of the fourth brownie is 0.

explanation: marginal utility is the addtional utility gained from the consumption of one more unit of a good. it is given by,

so, marginal utility at the 4th unit will be given by

since, the values are not given here, you can simply find marginal utility at fourth unit by subtracting total utility at 3rd unit from total utility at 4th unit.