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3 years ago

10

Horatio is purchasing a computer cable for $15.49.If the sales tax rate in his state is 5.25% what is the total cost of the purc

hase?

1 answer:

fiasKO [112]3 years ago

3 0

5.25% of $15.49 is 81¢ approximately. Therefore the total cost is $16.30.

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SOLUTION

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–3, 1, 5, 9, . . .

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Formula for sum of an arithmetic sequence is given by

$S_n=\frac{n}{2}\lbrack2a+(n-1)d\rbrack$

Substituting these values into the equation above we have

$\begin{gathered} S_n=\frac{n}{2}\lbrack2a+(n-1)d\rbrack \\ S_6=\frac{6}{2}\lbrack2\times-3+(6-1)4\rbrack \\ S_6=3\lbrack-6+(5)4\rbrack \\ S_6=3\lbrack-6+20\rbrack \\ S_6=3\lbrack14\rbrack \\ S_6=42 \end{gathered}$

Hence, the answer is 42, option B

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