Answer:
$83,320
Step-by-step explanation:
The formula to apply here is;

where;
A=Amount at the end
P=the amount to invest/principal
r=rate of interest as a decimal
n=number of compoundings in a year
t=time in years
Given that;
A=$400,000
P=?
r=8%=0.08
n=2
t=20
Substitute values in equation

P=$83,320 (to the nearest dollar)
Your answer is going to be A
First, you want to multiply 2 times 7 which is 14 then do 14 to the 4th power which is 38,416, then add that by 14 to the third power which is 2,744, so then you will get 41,160 which is your answer.
For this case we have the following function:

For each of the domains we will choose a value.
We have then:
For −5 ≤ x ≤ −1
Let's choose the value of x = -3
Evaluating the function we have:
Answer:
g(-3) = 1
For −1 < x ≤ 5:
Let's choose the value of x = 0
Evaluating the function we have:
Answer:
g(0) = 2
Third one I think 10,20,30,40