Product factor is an expression in where you multiply the same value digit many times. Exponent is the expression in where you convert product factor expression into a shorter expression For example of product factor: => 9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 As you can see, 9 is multiplied many times, that makes it longer. Now, let’s make this product factor shorter using exponent. => since 9 is multiplied 9 times the exponent expression is: => 9 9 in where 9 is the base and the other 9 is called exponent.
So, the longest tooth is 4 3/4 and the shortest is 3 1/4. So if you subtract 4 3/4 - 3 1/4, you will get the answer 1 2/4, which you can simplify to 1 1/2 or 1.5 :)
