1/8 is a interger, rational number, irrational number, real number, whole number, natural number its a mutliple answer question

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²