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3 years ago

A Purse cost $75.00 at Macy’s with a 25% discount. What is the sale price with 7% tax?

Mathematics

1 answer:

astraxan [27]3 years ago

4 0

Answer: $60.1875

Step-by-step explanation:

Since we are told that a purse cost $75.00 at Macy’s with a 25% discount. The sale price will be:

= $75 - (25% × $75)

= $75 - (0.25 × $75)

= $75 - $18.75

= $56.25

We will then add the 7% tax and this will be:

= $56.25 + (7% × $56.25)

= $56.25 + (0.07 × $56.25)

= $56.25 + $3.9375

= $60.1875

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erica [24]

At sea level, the pressure is 1013, that's when the altitude is at 0, sea level, let's see

$\bf \textit{Periodic Exponential Decay}\\\\
A=I(1 - r)^{\frac{t}{p}}\qquad 
\begin{cases}
A=\textit{accumulated amount}\to &1013\\
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\\\\\\
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so, the inital amount is 1013, when t = 0,

$\bf \textit{Periodic Exponential Decay}\\\\
A=I(1- r)^{\frac{t}{p}}\qquad 
\begin{cases}
A=\textit{accumulated amount}\\
I=\textit{initial amount}\to &1013\\
r=rate\to 11.8\%\to \frac{11.8}{100}\to &0.118\\
t=\textit{meters climbed}\to &t\\
p=period\to &1000
\end{cases}
\\\\\\
A=1013(1-0.118)^{\frac{t}{1000}}\implies A=1013(0.882)^{\frac{t}{1000}}$

now, to check the atmospheric pressure at 4000, simply set t = 4000, to get A.

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3 years ago

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Answer:

Step-by-step explanation:

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product of roots=αβ=c/a=-p-c

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Answer:

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Step-by-step explanation:

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