The formula for compound interest is : A = P(1+r/n)^nt
A = 4000 (1+0.021/4)^4x4
A = 4000 (1.021)^16
A = 5,577.91
Sergio's total interest would be : 5,577.91 - 4,000 = $ 1,577.91
hope this helps
Answer:

Step-by-step explanation:
To put factor back into the square root, we have to put squared value.
like 6 can be written as
.
Similarly, 5 can be written as 
= 
= 
= 
Step-by-step explanation:
V= Iwh
v-h = Iw
<u>v-h</u> = I
w
:. I = <u>v-h</u>
w
Answer:
y=|x|-7
If x=-9 then...
y=|-9|-7
First get the absolute value of -9
y=9-7
Subtract, and your answer is...
y=2