Since the question wants to know how many ingredients she used, All we have to do is add them.
So as the question says, she used 6/10 flour, 3 eggs, and 4/5 sugar.
Now we have two fractions in this scenario. Let's make them have the same denominator. Either we divide 6/10 by 2 or multiply 4/5 by 2. Let's multiply.
4/5 × 2 = 8/10
Now we have 6/10, 3, and 8/10
Lets add them together.
3 + 6/10 = 3 and 6/10
Now 3 and 6/10 + 8/10 = 4 and 4/10
Simplify even further...
and your answer will be 4 and 2/5
The area is 9.9 or 9 9/10
So find the diameter which is the radius times 2
So 3x2= 6
6x 3.14(Pi)
=18.84 which a full circle and now divide by two
9.42 is the area of semi circle
Most quadratic functions(which is what you have there, to a degree of 2) are solved using factoring and the zero product law. If you can not factor then you have to use the quadratic formula or graph it. However this one can be factored.
It's pretty simple to just factor it by inspection but I use the chart method, if you know decomposition that works as well.
Factoring gives us,

Then you set each factor to 0 and solve for x,



And the second one,


The solutions to this equation are
x = -1/2, 3
Yes you are correct it is a transformation and then a rotation