A researcher wants to determine what percent of all first graders who believe unicorns are real. She obtains a database of all current first graders in the USA, and sorts the database by the county in which the child attends school. She randomly selects 25 counties, and includes all first graders in each of them to form her sample. The sampling technique used by this researcher is:

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation:

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0

his first public project he is asked to create a small scale drawing. the garden is a right triangle with base 25m and height 30m. are you trying to solve for the last side/hypotenuse? the irrational form of the answer would be 5\sqrt{61}