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Aliun [14]
3 years ago
9

A teacher has $80 to buy workbooks. Each work book cost $3. If she buys as many workbooks as possible, how much money does she h

ave leftover?
A) $2
B) $4
C) $6
D) $8
Mathematics
1 answer:
DIA [1.3K]3 years ago
5 0

Answer: The answer is A; $2


Step-by-step explanation:

3 x 26 = 78

80 - 78 = 2


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Find the tenth term of the geometric sequence, given the first term and common ratio.
Natalija [7]

Answer:

a_{10}=\dfrac{1}{128}

Step-by-step explanation:

In the geometric series:

a_1=4\\ \\r=\dfrac{1}{2}

The nth term of the geometric sequence can be calculated using formula

a_n=a_1\cdot r^{n-1}

In your case, n = 10, then

a_{10}\\ \\=4\cdot \left(\dfrac{1}{2}\right)^{10-1}\\ \\=4\cdot \left(\dfrac{1}{2}\right)^9\\ \\=2^2\cdot \dfrac{1}{2^9}\\ \\=\dfrac{1}{2^{9-2}}\\ \\=\dfrac{1}{2^7}\\ \\=\dfrac{1}{128}

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The correct answer is 
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Answer:

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Step-by-step explanation:

Given data

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