A measurement using a ruler marked to an eighth of an inch is reported as 3 1/2 inches. What is the range of values for the actual measurement? Enter the correct answers as mixed fractions in the boxes from least to greatest.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Paul’s car is 18 feet long. he is making a model of his car that is 1/6 the actual size. what is the length of the model?

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?