Point p is the center of two concentric circles. pq= 10.5 and ps= 20.9. rs is tangent to the smaller circle and a chord of the larger circle. what is length of rs to the nearest tenth?

The sum of two numbers is 86, and their difference is 20. find the two numbers

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

87.5% , 100% , 83.33 , 93.33% , 100% , 82.5% are all the academic points i've gotten this quarter. what's my final grade?