What is the answer for question 10

What is the measure of sty in oo below? 130 310 230 50

Which equation can be solved to find x the measure of jk in the apex

Convert the number to decimal form. 12) 312five a) 82 b) 30 c) 410 d) 1560 13) 156eight a) 880 b) 96 c) 164 d) 110 14) 6715eight a) 53,720 b) 3533 c) 117 d) 152