Question

plz help
http://prntscr.com/9hbepu
i dont get it

Answer 1

this is different question

Answer 2

\[\huge~\rm~\bf~2(wl+hl+hw) \]

Answer 3

what that mean?

Answer 4

Ok this is the formula for the surface area of a rectangular prism
\[\huge~\rm~\bf~2(wl+hl+hw)\]
w=4 l=5 h=15
Plug them into the formula you get this:
\[\huge~\rm~\bf~2((4)(5)+(15)(5)+(15)(4))\]
Solve.

Answer 5

so wait we add all those and multiply by 2

Answer 6

No like this
(2)((4)(5))+(2)((15)(5))+(2)((15)(4))

Answer 7

310

Answer 8

so d

Answer 9

Correct :-)

Answer 10

thx

Answer 11

Here is a good video for you to see:
https://www.youtube.com/watch?v=Pcjnz26pnwY