What is the missing side length in this right triangle? 9 in & 12 in

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189

Identify one charcteristic of exponential growth