We will use the product rule:
d/dx( f(x) · g(x) ) = f´( x ) g( x ) + g´( x ) f( x ) ( and after that the chain rule )
y´ = ( x ) ´· e^(-x/2) + ( e^(-x/2)´ · x) =
=
Answer:
$9,840
Step-by-step explanation:
Let the money earned from college be 'x'.
Given:
Total money earned from the two jobs = $50,450
Money earned at the store = 1250 + 4(Money earned at college)
∴ Money earned at the store = 
Now, total money earned by Erica is the sum of money earned at store and college. Therefore,
Total money = Money at store + Money at college

Therefore, the money earned by Erica from her job at the college is $9,840.
Start on the y axis at +1 (0,1), from there move up 3 and right 1 so the next point would be (1,4) then (2,7) and so on...