Two cuboid-shaped metal bars are the same size. they are 12.4cm long, 5.6cm wide and 2.5cm thick. one bar is iron with a density of 7.9g/cm3 and the other is copper with a density of 9.0g/cm3. what is the difference in there masses to the nearest gram?

c. prove the lengths are the same.

step-by-step explanation:

you need to prove the segments are congruent. congruent segments have the same length. find the lengths of the segments using the distance formula, and compare them.

answer: c. prove the lengths are the same.

+25 = x

step-by-step explanation:

here x is the hypotenuse of a right triangle whose legs are 7 and 24.   by the pythagorean theorem, 7² + 24² must equal x²:

x² = 49 + 576 = 625.   thus, x = +√625 = +25 = x