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3 years ago

The sales tax for an item was $7.40 and it cost $370 before tax. find the sales tax rate. write your answer as a percentage.

1 answer:

8 0

The sales tax for an item was $7.40 and it cost $370 before tax. find the sales tax rate. write your answer as a percentage.

2.3%

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24 POINTS!!!!!!!!!!!!!!!!!

podryga [215]

1. Combining like terms
2. Combining

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3 years ago

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The Great Pyramid of Giza had edge lengths of 219 meters. If 2004-04-02-05-00_files/i0100000.jpg, find the area of one of the fa

stiv31 [10]

It is defiently answer C

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3 years ago

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The formula A=200e^.033t models the population of a particular city, in thousands, t years after 1998. When will the population

svetoff [14.1K]

Answer:

In the year 2010

Step-by-step explanation:

we have

$A=200e^{0.033t}$

where

A is the population in thousands

t is the number of years since 1998

For A=297 thousands

substitute and solve for t

$297=200e^{0.033t}$

simplify

$1.485=e^{0.033t}$

Apply ln both sides

$ln(1.485)=ln[e^{0.033t}]$

$ln(1.485)=(0.033t)ln(e)$

Remember that

$ln(e)=1$

$ln(1.485)=(0.033t)$

$t=\frac{ln(1.485)}{0.033}$

$t=12\ years$

1998+12=2010

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3 years ago

Look at this table of values. What is the y-intercept?

ratelena [41]

Answer:

I think y=3

Step-by-step explanation:

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3 years ago

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find the value of the trigonometric function sin (t) if sec t = -4/3 and the terminal side of angle t lies in quadrant II

kodGreya [7K]

Answer:

$sin(t) =\frac{\sqrt{7}}{4}$

Step-by-step explanation:

By definition we know that

$sec(t) = \frac{1}{cos(t)}$

and

$cos ^ 2(t) = 1-sin ^ 2(t)$

As $sec(t) = -\frac{4}{3}$

Then

$sec(t) = -\frac{4}{3}\\\\\frac{1}{cos(t)} =-\frac{4}{3}\\\\cos(t) = -\frac{3}{4}$

Now square both sides of the equation:

$cos^2(t) = (-\frac{3}{4})^2$

$cos^2(t) = \frac{9}{16}\\\\$

$1-sin^2(t) =\frac{9}{16}\\\\sin^2(t) =1-\frac{9}{16}\\\\sin^2(t) =\frac{7}{16}\\\\sin(t) =\±\sqrt{\frac{7}{16}}$

In the second quadrant sin (t) is positive. Then we take the positive root

$sin(t) =\sqrt{\frac{7}{16}}$

$sin(t) =\frac{\sqrt{7}}{4}$

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3 years ago