A 2 meter by 2 meter square sheet of titanium alloy is used to make an open box by cutting squares

D) 1/3

Step-by-step explanation:

Cut sizes are:

A) 1

Sides are:

Volume is

B) 2/5

Sides are:

Volume is:

C) 1/4

Volume is:

D) 1/3

Volume is:

E) 1/2

Volume is:

The largest volume is obtained when cut size is 1/3 m

Correct option is D.

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

step-by-step explanation:

(3rd option) - c