What should be measured to calculate the average rate at which the water in a cup cools?

Answer the questions in the attachment. a rescue helicopter is at point a and a rescue boat is at point e. the helicopter pilot spots boats in distress at points d and c,with angles as marked in the diagram. figure abce is a rectangle. the altitude of the rescue helicopter, represented by ae, is 5000 feet.

Nine more than four times a number is the same as one less than twice the number. find the number?

Identify the number 127 as a rational or irrational. explain