if you do not have a Unit Circle, this is a great time to get one, you can find many online just do a quick search for "unit circle".
Check the picture below.
Answer:
7-(a-2)
Step-by-step explanation:
First we need to find where the 2 graphs intercept.
x^2 + 3 = - (x^2 - 4x + 4) + 7
x^2 + 3 = -x^2 + 4x + 3
2x^2 - 4x = 0
2x(x - 2)
x = 0 , 2. are x coordinates of the 2 intercepts.
7 stamps. He will give 6 stamps to them each and there will be 7 left
0.0000000861 is your answer