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beks73 [17]
2 years ago
11

the total number of living humans on arth was converted to scientific notation using an online caculation and was reported to be

approximately 7.158*109. write earth's population as a single digit times and iterger power of 10 andin standard form.
Mathematics
1 answer:
gogolik [260]2 years ago
6 0
7.158 * 10^9 rounds to 7 * 10^9
7 * 10^9 = 7,000,000,000
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Answer:

FYAB gives a better deal.

Step-by-step explanation:

Compound interest:

A = P(1 + \dfrac{r}{n})^{nt}

Continuously compounded interest:

A = Pe^{rt}

For the quarterly compounded interest, r = 0.25%, and n = 4.

2P = P(1 + \dfrac{0.0025}{4})^{4t}

1.000625^{4t} = 2

\log (1.000625^{4t}) = \log 2

4t(\log 1.000625) = \log 2

t = \dfrac{\log 2}{4\log 1.000625}

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A = Pe^{rt}

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\ln 2 = \ln e^{0.0023t}

\ln 2 = 0.0023t

t = \dfrac {\ln 2}{0.0023}

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Answer: FYAB gives a better deal.

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3 years ago
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