Answer:
it's 2.06
Step-by-step explanation:

The solution is f².
<h3>How to solve for this</h3>
The question that we have here is of the form f to -1 power times -2. To have a better graphic image we can rewrite it as

Now we have to multiply the powers -1 and -2
Remember that in the rules of mathematics, the solution for -1 and -1 = 1
This tells us that - * - = +
Hence we would have -1 * -2
= 2
Therefore the power would be f²
<h3>How do you simplify exponents and powers?</h3>
In order to carry out the simplification of exponents what you have to do would be the multiplication of the exponents that are in the question. The base of the question remains unchanged.
For example, (2³)⁵ = 2³ˣ⁵ = 2¹⁵. For any positive number x and integers a and b: 
The exponents here are the numbers that are written above the base. They usually tell us how many times the base would have to be multiplied by itself to get a solution.
Read more on multiplication of powers here:
brainly.com/question/26130878
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The appropriate method to use in solving the given question is permutation. Then, the numbers of ways to arrange the buttons is 1320 ways.
In the given question, the order of arrangement is important, so that the number of ways that Fiona could order the buttons can be determined by permutation method.
i.e 
= 
Red 6
Green 3
Yellow 3
Total 12
Since no two neighbouring buttons of the same colour is allowed, then 3 buttons would be arranged at a time.
Thus, n = 12 and r = 3;

= 
= 
= 
= 12 x 11 x 10

= 1320
Therefore the buttons can be arranged in 1320 ways without two neighbors having the same colour.
Visit: brainly.com/question/1408616
Answer:
532.52
Step-by-step explanation:
P 2(10-inch pizza)=407*3.72-358*0.49=1514.04-175.42=1339.62
P2(12-inch pizza)=169*5.26-142*0.04=888.94-5.68=883.26
P=1339.62+883.26=2222.88
2222.88-1690.36=532.52