What is the square root of negative 40

Find the distance from the theater to the library. leave your answer in simplest radical form if necessary. 12 √12 74 √74

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse

Two cities a and b are 1400km apart and lie on the same n-s line. the latitude of city a is 23 degrees. what is the latitude of city b. the radius of the earth is approximately 6400km.