Question

do there look right if so can someone help me with the last two questions

Answer 1

the questions are in the docx file

Answer 2

First Question:
\[R_{total} = {1 \over {1/5 + 1/5+ 1/10}} = 2\]
I=V/R
=9/2
=4.5(A).
The total current is 4.5 A.

Second Question:
P=VI
= 9*4.5
=40.5 (W)
The total power is 40.5 W.