The radius of a circle is 4 kilometers. What is the angle measure of an arc bounding a sector with area a 3.14 square kilometers?

Trigonometry hellllllpppppppp asap

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?

Mr.zimmerman invested $25,000 in an account that draws 1.4 interest, compouneded annually. what is the total value of the account after 15 years