Answer:
Federal funds rate
Explanation:
The federal funds rate is the interest rate at which depository institutions (banks and thrifts) lend reserve balances to each other to meet reserve requirements.
Reserve requirements are the amount of funds required by the central bank that banks should keep as reserves to meet liabilities
the Federal funds rate is currently maintained at a range of 0% to 0.25%
An increase in spending of $25 billion increases real gdp from $600 billion to $700 billion. The marginal propensity to consume must be "4".
<h3>
What do you mean by Marginal Propensity to consume?</h3>
The marginal propensity to consume is refers to as the proportion of any change in income that is spent on consumption.
In economics, this term is used to refer to the measurement made in order to determine consumption when the rent is increased by one unit. This measurement is nothing more than a mathematical relationship to calculate how people invest in consumption or save the income that is increased.
Calculation:

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So they are more likely to find where they are in that career oath
Answer:
$7800
Explanation:
Barney's salary per month = $700
His salary for nine months = 9 × $700 = $6300
Research grant received = $1500
His gross income = his salary for nine months + research grant received = $6300 + $1500 = $7800