When Mark bought his first tv it was was 24 inches wide and 16 inches tall. It cost $672. His new tv is 48 inches wide and 32 inches tall and costs $1152. How much more expensive as measure by cost per square inch, was his first TV compared to his newest TV?
Let's be accurate as possible and think first.
1
His first TV was 384 square inches because 24 x 16 = 384.

His first TV cost $1.

75 per square inch because 672 / 384 = 1.

75.

His new TV is 1,536 square inches.

It costs $.

5 per square inch because 1152 / 1,536 =.

5.

His old TV cost $1 more per square inch because 1.

75 -.

75 = 1.

.

Therefore, the answer is 1