Asap explain how to solve step by points a and b are on opposite sides of a lake. a point c is 81.3 meters from a. the measure of angle bac is 78.33°, and the measure of angle acb is determined to be 34.167°. find the distance between points a and b (to the nearest meter).

M∠B=180 - 78.33 - 34.167 = 67.503°

By the law of sines:

AB/sinC = AC/sinB  ⇒  
AB = (AC*sinC)/sinB = (81.3*sin34.167°)/sin67.503° =
      =(81.3*0.5616)/0.9239 ≈ 49 m.

$18.25 ($365 divided by 20)

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.