a desk originally priced at $276 is on sale for 20% off. If sales tax is 7%, how much will the desk cost on sale, including tax?

Mathematics

1 answer:

uysha [10]3 years ago

4 0

Answer:

$236.i hope so

Step-by-step explanation:

cost.=276

discount =20%

price after dis.= 276-20%of 276=221

tax =7%

total cost =221+7%of 221

=236

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wlad13 [49]

The correct answer is c :)
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MakcuM [25]

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3 years ago

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Goryan [66]

Answer:

$\displaystyle f(x)=4\cdot\left(\frac{1}{2}\right)^x$

Step-by-step explanation:

<u>Exponential Function</u>

The exponential function can be written with the general equation:

$f(x)=A\cdot r^x$

Where A is the value when x=0 and r>0 is the ratio. If r is greater than 1, the function is increasing, if r is less than 1, the function is decreasing.

The table shows the relation between values of x and values of the function y. Note that as x increases (one by one), y decreases with a ratio of 1/2. Only the last two choices have ratios of r=1/2. We only have to test which one of them has the correct value of y=4 when x=0.

Substituting in the third function:

$\displaystyle f(x)=4\cdot\left(\frac{1}{2}\right)^x$

$\displaystyle f(0)=4\cdot\left(\frac{1}{2}\right)^0$