A homeowner is to construct a ramp to his front door to make is wheelchair accessible. How long does the ramp need to be if the door is 4 feet above ground level and the angle of elevation is 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.

Ithink it is15not sure tho

Sry i don't know the answer but are u from kastner?