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3 years ago

3.7 radians into degrees ans round off your answer to the nearest degree.

Mathematics

1 answer:

kap26 [50]3 years ago

4 0

If I did the math right it would be 212°.
180°/pi x 3.7 = 666/pi = 212°

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An author published a book which was being sold online. The first month the author sold 21000 books, but the sales were declinin

Wittaler [7]

Answer: 119,616

You may have to erase the comma when inputting the answer.

=======================================================

Explanation:

The author sells 21,000 books in the first month.

Then they sell 21,000*(1-0.12) = 21,000*(0.88) = 18,480 in the second month.

Then they sell 18,480*(1-0.12) = 18,480*(0.88) = 16,262.4 = 16,262 in the third month.

And so on. These values follow a geometric sequence with first term a = 21,000 and common ratio r = 0.88

We can think of the 0.88 as 88% of the original value (since losing 12%, we keep the remaining 88%)

-------------

Use the formula below to sum the first 9 terms of the geometric sequence

Plug in a = 21000 and r = 0.88

$S_n = a*\frac{1-r^n}{1-r}\\\\S_9 = 21000*\frac{1-0.88^9}{1-0.88}\\\\S_9 \approx 21000*\frac{0.6835216}{0.12}\\\\S_9 \approx 21000*5.6960133\\\\S_9 \approx 119,616.2793\\\\S_9 \approx 119,616\\\\$

The author sold about 119,616 books over the course of the first nine months.

4 0

2 years ago

Mr. Wallis took his home design to the copier and enlarged it 400%. What is the area of the diagram now? Show how you know. The

mr_godi [17]

Answer:

15m=100%

? =400%

400×15/100

15×4

=60m

3 0

3 years ago

Evaluate the following expression when x = 3 and y = 4:

OLEGan [10]

$\dfrac{ {3}^{2} + {4}^{3} }{2 + 3} \\ = \dfrac{9 + 64}{5} \\ = \dfrac{73}{5} \\ = 14.6$

Answer is C.

Hope this helps. - M

3 0

3 years ago

Read 2 more answers

84784+24849+748429+123456

zhuklara [117]

Answer:

981,518

Step-by-step explanation:

Have a nice day :)

5 0

2 years ago

The human body has a normal temperature of 98.6°F. Doctors will get worried if a sick patient has a temperature that varies from

makvit [3.9K]

Answer:

$|T- 98.6| \geq 3$

And in order to solve this we have two possibilities:

Solution 1

$T -98.6 \leq -3$

And solving for T we got:

$T \leq 98.6- 3$

$T\leq 95.6$

Solution 2

And the other options would be:

$T -98.6 \geq 3$

$T \geq 101.6$

Step-by-step explanation:

For this case we can define the variable os interest T as the real temperature and we know that if we are 3 F more than the value of 98.6 we will be unhealthy so we can set up the following equation:

$|T- 98.6| \geq 3$

And in order to solve this we have two possibilities:

Solution 1

$T -98.6 \leq -3$

And solving for T we got:

$T \leq 98.6- 3$

$T\leq 95.6$

Solution 2

And the other options would be:

$T -98.6 \geq 3$

$T \geq 101.6$

6 0

3 years ago