Answer:
see explanation
Step-by-step explanation:
The surface area (A) of a sphere is calculated as
A = 4πr² ← r is the radius, here r = 9, thus
A = 4π × 9² = 4π × 81 = 324π ≈ 1017.9 units²
Answer:
30 days
Step-by-step explanation:
Answer:
Sn = -9(1-(-3)^n)/4
Step-by-step explanation:
Since r < 1, the sum of nth term of a geometric sequence is expressed as;
Sn = a(1-r^n)/1-r
a is the first term
n is the number f terms
r is the common ratio
An = -9(1-(-3)^n)/1-(-3)
Sn = -9(1-(-3)^n)/4
Hence the sum of the nth term of the series is Sn = -9(1-(-3)^n)/4
It was decreased by 20% which is $30.00 less
Making it $120.00
Area of each button:
(3x)²π
= 9x²π
Total fabric required for all buttons:
(9x²π) x (x)
= 9x³π
Sorry, I can't provide the exact answer because I don't know the value of x. To find the exact answer, type that into a calculator along with the value of x
