Which correctly list the three gases that each make up less than 1 percent of Earth’s atmosphere? argon, water vapor, carbon dioxide
oxygen, argon, water vapor
nitrogen, oxygen, carbon dioxide
carbon dioxide, oxygen, argon

Please quick

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?