How do i calculate the perimeter and the area

Which of the following shows the length of the third side, in inches, of the triangle below

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.