The surface area of a sphere is A = 4 π R² .
Sadly, the question doesn't give you 'R', so you have to
back it out of the circumference.
Circumference = π (diameter)
Divide each side by π : Diameter = circumference / π
Radius = 1/2 diameter: Radius = circumference / (2 π)
Area = 4 π R² =
4 π (circumference/2π)² =
4 π (circumference)² / 4 π²
Divide top and bottom by 4π : Area = (Circumference)² / π
Circumference = 37.68 units
Area = (37.68)² square units /π =
<em>451.93 square units</em>
Suppose king has 100% of rubies and he decided to give 20% away so he's left with 80%. After that he decided to give 25% of 80% so he's left with 60% of the total rubies. Moreover he distributed 30% of the 60% he had finally he has only 42% of the original left with him that totalled to 21
42x/100=21
x=50
King had total 50 rubies
First daughter share= 50*20%= 10
Second daughter share= 40*25%= 10
Third daughter share= 30*30% = 9
I honestly believe its D but I'm not for sure. Sorry if i didn't help much
2x + y = 8
3x - y = 17
---------------add
5x = 25
x = 25/5
x = 5
2x + y = 8
2(5) + y = 8
10 + y = 8
y = 8 - 10
y = -2
solution is (5,-2).....this is consistent and independent because it has one solution
Answer:
35
Step-by-step explanation: