3) Your credit cards closed on the 14th of every month and opens a new statement on the 15th of every month, your payments on your statement balance are due on the 1st. You have an APR of 19.99%. a) If you made a purchase for a new laptop for $1800 on June 17th, how many interest free days will you have left?

tell me the question and i will be able to answer : )

answer; /// radio frequency identification;

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.