Hello!
Hope this helps u!
For 7 :
The values are given u have to find out the value of z
Sin38= O/H
Z is H ( longest side )
And Y is O (opposite of marked angle)
The answer will be A 68.2 cm
For 8 :
The same thing
Sin 70= O/H
The lighthouse is 160 tall
It is the Oppo ( opposite of marked angle 70) and u have to find the hypo (hypotenuse)
The answer will be D : 170 feet
Hope this helps!