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Bezzdna [24]
2 years ago
11

What is the sum of? A. S=1.5 B.S=2 C.S=4.5 D.=8

Mathematics
2 answers:
sweet [91]2 years ago
5 0
8.  You can graph this or use the summation function on the TI computer. 
Arada [10]2 years ago
3 0
∞
∑4(0.5)ⁿ⁻¹
n=1
For n = 1 → 4(0.5)¹⁻¹ = 4(0.5)⁰ = 4(1) = 4
For n = 2 → 4(0.5)²⁻¹ = 4(0.5)¹ = 4(0.5) = 4(0.5)
For n = 3 → 4(0.5)³⁻¹ = 4(0.5)² 
For n = 4 → 4(0.5)⁴⁻¹ = 4(0.5)³ 
We notice this is a geometric series with first term:
a=4 & r= 0.5
Since r<1, then the formula of the sum when n→∞ is:

Sum= a(1/1-r)
Sum = 4/(1-0.5)
Sum = 4/(1/2) = 4 x 2

 ∞
∑4(0.5)ⁿ⁻¹ = 8 (answer D)
n=1

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Answer:

2 hrs 13 mins

Step-by-step explanation:

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4 0
3 years ago
Two companies Company A and Company B offer the same starting salary of $20,000 per year. Company A gives a raise of $1000 each
Bingel [31]
A.) A = 20000 + 1000n
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c.) Using a graphing calculator, it takes 18 years for the
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5 0
3 years ago
13-yard gain, what is the integer
stellarik [79]
Hmm, I'm confused...

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7 0
3 years ago
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IrinaVladis [17]

Answer:

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Step-by-step explanation:

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If there are 21 picks, we need to divide by 7  to see how many times we need to multiply

21/7 = 3

Multiply everything by 3

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Answer:

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Step-by-step explanation:


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