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B and C i think double check just in case
Answer:
Brianne gets 25.12 inches² of pancake.
Step-by-step explanation:
Assuming the pancake to be a circular shape.
If the pancake's distance from one side of the pancake to other side was 8 inches, then diameter of circle = 8 inches. It means radius = 4 inches.
Brianne cut her pancake in half to share with friend. It means Brianne gets half-circular shape. So we need to find area of half-circle.
Area of half-circle = (1/2)πr² = (1/2) x 3.14 x 4² = 1.57 x 16 = 25.12 inches².
Hence, Brianne gets 25.12 inches² of pancake.
Answer:
Equation: 
Intersection: 
Step-by-step explanation:
We are asked to write an equation of the sphere with center center
and radius 4.
We know that equation of a sphere with radius 'r' and center at
is in form:

Since center of the given sphere is at point
, so we will substitute
,
,
and
in above equation as:


Therefore, our required equation would be
.
To find the intersection of our sphere with the yz-plane, we will substitute
in our equation as:




Therefore, the intersection of the given sphere with the yz-plane would be
.
True is the answer your welcome