Which conjunction or disjunction is equivalent to the following inequality? |a - 9| ≤ 4 a - 9 ≤ 4 and a - 9 ≤ - 4 a - 9 ≤ 4 and a - 9 ≥ - 4 a - 9 ≤ 4 or a - 9 ≤ - 4 a - 9 ≤ 4 or a - 9 ≥ - 4

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

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?

The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points