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sashaice [31]
3 years ago
9

What number has factors that add up to thirty

Mathematics
1 answer:
NNADVOKAT [17]3 years ago
5 0
29 = 1 * 29
1 + 29 = 30
thus answer is 29
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Answer:

\displaystyle a_8=142,11\ mg

Step-by-step explanation:

Geometric sequence

Each term in a geometric sequence can be computed as the previous term by a constant number called the common ratio. The formula to get the term n is

\displaystyle a_n=a_1r^{n-1}

where a_1 is the first term of the sequence

The problem describes Georgie took 275 mg of the medicine for her cold in the first hour and that in each subsequent hour, the amount of medicine in her body is 91% (0.91) of the amount from the previous hour. It can be written as

amount in hour n = amount in hour n-1 * 0.91

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\displaystyle a_n=275\ .\ 0.91^{n-1}

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In the 8th hour (n=8), the remaining medicine present is Georgie's body is

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\displaystyle a_n=275\ .\ 0.91^{7}

\boxed{\displaystyle a_8=142,11\ mg}

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3 years ago
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