Sonya saved $15,000 last summer from working on a road construction crew in montana. what a great job. she came back really tan. she wants to invest the full amount now so that in 10 years she can buy her dream car, which costs $30,000. what rate of return will she need to receive in order to accomplish this goal

7.18%

Explanation:

Data provided in the question:

Principle amount i.e the amount invested = $15,000

Time, n = 10 years

Future value = $30,000

Now,

Using the compounding formula

we have

Future value = Present  value × ( 1 + rate )ⁿ

Therefore,

$30,000 = $15,000 × ( 1 + rate )¹⁰

or

2 = ( 1 + rate )¹⁰

or

1 + rate = 1.0718

or

Rate = 1.0718 - 1

or

Rate = 0.0718

or

Rate = 0.0718 × 100% = 7.18%

due to the changes the federal reserve is making the unused reserves will impact the economy by them facing inflation. inflation is definfed as the increase in pricing of a good or service but the decline of the value of money used for purchasing those items. when the economy has a high inflation rate, they are subject to money loss and hurt on the economy.

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.