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Inga [223]
4 years ago
13

Use the formula for the sum of the first n terms of a geometric sequence to solve. Find the sum of the first 8 terms of the geom

etric sequence: -8, -16, -32, -64, -128,
Mathematics
1 answer:
Dvinal [7]4 years ago
8 0

Answer:

-2040

Step-by-step explanation:

S_n=a_1\dfrac{r^n-1}{r-1} \qquad\text{for first term $a_1$ and common ratio r}\\\\S_8=-8\dfrac{2^8-1}{2-1}=-2040

The sum of the first 8 terms is -2040.

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Solution for what is 147.1% of 155

155/x=100/147.1
(155/x)*x=(100/147.1)*x       - we multiply both sides of the equation by x
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