The answer is negative, because the first number is negative.

this is because when 40 is broken down into two numbers (one divisible to get out of the square root, and one not) you get 25 + 15 under the square root. we know that the square root of 25 is 5, so we can put 5 outside the root and leave 15 inside.
-------------- try the next problem, and if you don't understand, please reply back.
answer is for a) 
Answer:
so you use the formula:
A = P(1 + r/n)nt
Where:
A = Accrued Amount (principal + interest)
P = Principal Amount
I = Interest Amount
R = Annual Nominal Interest Rate in percent
r = Annual Nominal Interest Rate as a decimal
r = R/100
t = Time Involved in years, 0.5 years is calculated as 6 months, etc.
n = number of compounding periods per unit t; at the END of each period
and you will get:
A = $ 4,432.85
A = P + I where
P (principal) = $ 3,600.00
I (interest) = $ 832.85
-3 × -5 = -15
-15 × 0 = 0
Answer:
f(x) = 4 · 4^x , f(x) = 4 · 2^x+2 , f(x) = 1/4 · 2^x+6
Step-by-step explanation:
Substitude x with a number.
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