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3 years ago

Original price of a book: $90.50 Tax: 4%

Mathematics

2 answers:

Elan Coil [88]3 years ago

7 0

Answer:

$94.12

Step-by-step explanation:

If the original price is $90.5 then you would have to multiply

90.50*104%,you multiply 104% because 100% is sopposed to be the original price and the tax adds up the price by 4% so,

100%+4%=104%

104%*90.50=$94.12

tensa zangetsu [6.8K]3 years ago

3 0

Answer:

The tax is $3.62

So the price now is $94.12‬

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Step-by-step explanation:

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Answer:

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If we divide equations (2) and (1) we got:

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And the best option would be:

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Step-by-step explanation:

the general formula for a geometric sequence is given by:

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For this case we know that $a_5 = 15, a_6 = 1$

Then we have the following conditions:

$15 = a_1 r^4$ (1)

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If we divide equations (2) and (1) we got:

$\frac{r^5}{r^4}= \frac{1}{15}$

And then $r= \frac{1}{15}$

And then we can find the value $a_1$ and we got from equation (1)

$a_1 = \frac{15}{r^4} = \frac{15}{(\frac{1}{15})^4} =759375$

And then the general term for the sequence would be given by:

$a_n = 759375 (\frac{1}{15})^n-1 , n=1,2,3,4,...$

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C) a1=759,375; an=an−1⋅(1/15)

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