Answer:
4.37 cm
Step-by-step explanation:
This is just one way to solve it:
y is adjacent to 70° and 12 cm is opposite of 70°
(you can remember which function to use with sohcahtoa, google it if you dont understand)
tan(70) = 12/y
Cross multiply: (y times tan(70), 12 times 1) ytan(70) = 12
Divide both sides by tan(70) and y comes out to be roughly 4.37 cm