[04/04, 13:08] Apostle ELIJAH Ben: *PROBLEM OF THE DAY*
Some birds were flying and met a bird on their way. The bird greeted them; hello hundred! They said we are not hundred, we need half of us plus you to make us hundred.
Question: How many birds were flying?
Possible answers
*A. 198*
*B. 49*
*C. 66*
*D. 51*
*E. 101*
what is the correct answer?
Try to prove your Answer if you can

A.

Step-by-step explanation:

Let the number of the birds apart from the newcomer, be x.

x/2 + 1 = 100

which means,

x/2 = 100 - 1,

this gives us a 99.

x/2 = 99.

To get the actual number and kill the fraction we multiply by 2.

x = 2 x 99

...

x= 198...

Therefore,

The total birds flying were 198.

PROOF:

198/2 = 99.

99+ 1 = 100.

That one added to the 99 is the newcomer bird.

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: