Help me please. I don't understand how to do this

a. 781 meters

b. 319 meters

Step-by-step explanation:

by using the pythagorean theorem, a^2 + b^2 = c^2, you can find that 500^2 + 600^2 = the square root of 610000, which rounds to 781.

to find how much shorter it is, add 600 and 500 to get 1100, and subtract 781 from it. you get 319.

d

step-by-step explanation:

d

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: