The floor of a round hut has a radius of 2 yards. What is the floor's circumference? Use 3.14 for ​.

I’m confused on how to work the pie charts

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.

At a certain temperature the speed of sound in the air is 330 meters per second. which of the following expressions would convert this speed into kilometers per second