What is the circumference of this circle, in centimeters? Use StartFraction 22 over 7 EndFraction for Pi.

A circle with diameter 21 centimeters.

33

66

207.4

346.5

Click on the graphic until you find the right quotient. (36xa - 30xb) ÷ (-6x2)

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.