Asquare is cut out of a copper sheet. two straight scratches on the surface of the square intersect forming an angle. the square is heated uniformly. as a result, the angle between the scratches

a) increases
b) decreases
c) stays the same
d) the answer depends on whether θ is an acute or obtuse angle.

(c) Stay the same

Step-by-step explanation:

Final angle will be same as initial angle. But length of lines will increase in both direction proportionally.

However any normal curve(closed or open ) will remain proportional to initial one. It is like a Zooming or magnifying of object.

518,400

step-by-step explanation:

the area is multiplying all the given measurements together.

40 * 18 * 30 * 24 = 518,400

x=6 and x=3

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