4 tens, which is 40 and 9 ones, which is 9 40+9
and if the underlined digit is 4, the answer would be 40. if the underlined digit is 9, it would be 9.
The differential of

is

where the partial derivatives are

So the differential d<em>w</em> is

Answer:
wait is that a test if it is cheating
Step-by-step explanation:
well the first one go on the bottom 2 row secound one first row third first row but it is in happpy i am not reall good at math XD third last row forth very happy fifth on unhappy sixth very unhappy seven very unhappy eight on very happy i think i got it i did this before i just don't rembear but i tried
Try to find the common factor which is 2.
So:
Multiply by 2 both variables in parenthesis and you get:
2*(l+w)
Step-by-step explanation:
x×1/2×1/4×3/4
x×3/32
3/32x