Find the value of x please help

What is a rational number between 9.5 and 9.7

Use set builder notation to represent the following set: { -3, -2, -1, 0}

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?