In the figure, a and b lie on the same horizontal ground and are 250m apart. cd is a vertical building on the ground, where ∠cab=30° and ∠cbd=48°. i need to find the height of the building and correct it to 3 significant figures.
you.

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.

The total would be 40.53

32

step-by-step explanation:

these are your clues: 1. kim ran 18 races2. this was four fewer races than twice thenumber, notice it says twice the number, so you would do the equation 18x2-4; which equals the number 32.thus, 32 is your answer.