PLEASE THEY WOLL CANCEL EVERYTHING I DONE THIS YEAR: Angie completes 80% of her homework problems before basketball practice. She was assigned 30 problems total. How many problems were completed before basketball practice?

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?

What is the the greatest common factor ?

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units