Answer:
d
Step-by-step explanation:
20% of her students are in physical science. there is actually 30% or .3 students in physical science.
Two angles are supplementary when they <span>add up to 180 degrees.
x = </span><span>smaller angle
</span>2x+3 =<span> larger angle
x + 2x + 3 = 180
3x = 180 - 3
3x = 177
x = 177/3
x = 59</span>° ← smaller angle
2x + 3 = 2*59 + 3 = 121° ← larger angle
For this we have have to use Pythagoras Theorem
11^2 + 13^2 = 121 + 169 = 290
We then Square root 290 which gives us 17.02