The length of the arc of a 90 degree sector of a circle is 10 (pi). What is the radius​

Can someone 50 first drop menu 0.80 or 0.75 or 1.20 or 4.00 second drop menu 4.00 or 0.75 or 0.25 or 3.75 3rd 15,6,10, or 9 4th yes or no

896.31 cm= km 100cm = 1m 1000m = 1km a) 0.0089631 b) 0.0089631 c) 8.9631 d) 89.631

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year