To solve for surface area of a sphere, the formula is 4*pi*r^2 where "r" is the radius. Since we know the diameter and that it is the length across the sphere, and that the radius is the distance from the center to the edge, we can divide the diameter by 2 to get the radius. This shows the radius is 5. Now all we have to do is substitute in the 5 for the "r" and solve.
SA=4*pi*r^2
SA=4*pi*5^2
SA=314.159
We are rounding to the hundredth here, so we can say the surface area of the sphere is (A) approximately 314.16 square miles.
Answer:
30 degrees
Step-by-step explanation:
Answer:
21π m, or ≈ 65.94 m
Step-by-step explanation:
Remember that π is the ratio between a circle's circumference and its diameter, or, in equation form:
where c is the circumference and d is the diameter. If we want to find the <em>circumference</em>, we can just multiply that equation by d on both sides to get
Here, our d = 21 m, so our circumference would be
m, or approximately 21(3.14) = 65.94 m
Answer:
B only if
Step-by-step explanation:
If b is 5y=-2x+3
Then its b
Because the slope to be perpendicular it would be -2/5
Answer:
The biggest common factor number is the GCF number. So the greatest common factor 3 and 12 is 3.
Step-by-step explanation: