Can someone pls help and ty

16.3

Step-by-step explanation:

I'm assuming side a is the hypotenuse.

Cosine rule is

so = 16.33542217

The attached picture is a diagram if you are confused

The labelling of the sides doesn't matter as long as the unknown side is c

Dbc if u do the math and stuff that what i got let me know if i was wrong

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.