Step-by-step explanation:
Use the sine and cosine trig functions
21) cos(52)=13/x
x=13/cos(52)
x=21.1
22) sin(75)=6/x
x=6/sin(75)
x=6.2
I have linked a picture with the intervel.
Do 2x6=12×3 since there is 3 packages 2 rows and 6 in each row
I hope this helps you
90-8.5
90-40
50