Can someone help so maybe i dont fail 55 points please and thank you

no. 3 ans is 6

we know,

volume of cube = l^3

=2^3

=2×2×2

=8cm*

2^3

practice. practice. practice.

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c