Can somebody help with these.

Question

Simplify (be sure to rationalize all denominators)
11. 3/[SQRT(5) - 2]
and
this..
Note: I only need help on the b part of the question..
15. Assume that a surveyor stands at the top of a mountain that is “h” feet tall. If the distance (in feet) that he can see is defined by d = 3200.2 SQRT(h), then answer the following. (a) How far can the surveyor see from the top of a 2000-foot mountain? (b) How tall is the mountain, if the surveyor can see 15 miles? (Note: 1 mile equals 5280 feet.)

Answer 1

11. Multiply numerator and denominator by sqrt(5) + 2. The denominator will become 5 - 4 = 1.

15. Use the formula you were given to solve for h, where d = 15x5280 = 79,200 feet

Answer 2

is that the answer for number 11?

and would the distance equal 79,200? and if so would I convert back to miles?

Thank you.

Answer 3

You have not completed #11. On #5, I gave you the distance in feet (79200). You solve for the altitude. We are here to help you, not to provide complete solutions for you to turn in

Answer 4

Ok yes i do ont want the answers but I want to know the next step in solving the equation....
once i have 5-4=1 as my dementaor what would i do?

Answer 5

Denominators of 1 can be ignored.
x/1 = x, no matter what x is