What is the decimal expansion of the following fraction 5/8

The figure below shows rectangle abcd and the triangle eca on a coordinate plane. which of the following expressions represents the perimeter of triangle of triangle eca in units

Which expression is rational? 6. , square root two, square root 14, square root 49

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?