Reflection across the x-axis:

y = − f ( x ) y = -f(x) y=−f(x) The concept behind the reflections about the x-axis is basically the same as the reflections about the y-axis.
someone please help her or him please
She would have to score atleast a 74 on the test for her average to be 78
In order to subtract fractions, you need the denominators (bottom number) to be the same.

.
4πr2
= 4×π×42
= 64π
= 201.06192982975 inches2
The answer should be the last one