Help me please! I’ll mark as brilliant

the pillow's length is 1.4 m

Step-by-step explanation:

Since the volume of the pillow is 0.35 m^3,

and the volume of the prism is the product of the area of the base (right angle triangle in our case) time it height (the unknown in our case,, we can set the following volume equation and solve for "x":

Volume = Area triangle *  x

0.35 = (0.5 * 1 / 2) * x

0.35 = 0.25 * x

x = 0.35/0.25

x = 1.4 m

; )

step-by-step explanation: ; )