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artcher [175]
3 years ago
14

Help me plz I’m struggling with this

Mathematics
1 answer:
elena-s [515]3 years ago
3 0

Answer:

AC = 8√3       AC = 7.65          

A = 43.17°       AB = 16.8

B = 46.83°      B = 27°

Step-by-step explanation:

FIRST TRIANGLE

by using pythagorus theorem:

Hypo² = Base² + height²

19² = 13² + AC²

AC² = 19² - 13²

AC² = 192

AC = √192

AC = 8√3

sinФ =base/hypo

sin A = 13/19

A = sin^-1 (13/19)

A = 43.17°

43.17°+ B + 90° =180 (sum of angles of triangle)

B = 180° - 133.17°

  = 46.83°

<h3>SECOND TRIANGLE</h3>

TanФ = base/height

Tan 63° = 15 / AC

1.96 = 15/AC

AC = 15/1.96

AC = 7.65

AB² = AC² + BC²

AB² = 7.65² + 15²

AB² = 283.5

AB = √283.5

AB = 16.8

tan B = AC /BC

tanФ = 7.65/15

tanФ = 0.51

Ф = tan^-1(0.51)

B = 27°

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Answer:

Aha..our nemesis problem. :)

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Step-by-step explanation:

First, use a 30-60-90 triagle to find the apothem.

5\sqrt{3} =8.66\\8.66*5=43.30\\43.30/2=21.65\\

That is the area of 1 triangle. There are 6 of them in a hexagon, so multiply that number by 6:

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Have a great day!

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3 years ago
A scientist is studying the growth of a particular species of plant. He writes the following equation to show the height of the
Savatey [412]

Answer:

(A) The reasonable domain to plot the growth function is (0 ≤ <em>n</em> < 5).

(B) The <em>y-</em>intercept of the function is 10 cm. It represents the height of the plant at the beginning of the experiment.

(C) The slope of 0.21 implies that the plant is growing 0.21 cm every day.

Step-by-step explanation:

The equation representing the height of the plant is:

f (n)=10\cdot (1.02)^{n}

(A)

It is provided that at the end of the study the height of the plant was approximately 11.04 cm.

Compute the range of values of <em>n</em> as follows:

f (n)=10\cdot (1.02)^{n}\\11.04 = 10\cdot(1.02)^{n}\\1.104 = 1.02^{n}\\\ln (1.104) = \ln (1.02^{n})\\\ln (1.104) = n \ln (1.02)\\\\n = \frac{\ln (1.104)}{ \ln (1.02)}\\\\n = 4.99630409516\\n\approx 5

Thus, the reasonable domain to plot the growth function is (0 ≤ <em>n</em> < 5).

(B)

The <em>y</em>-intercept, in this case would represents the height of the plant when they began the experiment.

That is, the <em>y</em>-intercept of the function is the value of f (n) for <em>n</em> = 0.

Compute the value of f (<em>n</em> = 0) as follows:

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Thus, the <em>y-</em>intercept of the function is 10 cm. It represents the height of the plant at the beginning of the experiment.

(C)

Compute the values of f (n = 1) and f (n = 5) as follows:

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Compute the average rate of change as follows:

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Thus, the average rate of change of the function f(n) from n = 1 to n = 5 is 0.21.

The average rate of change is known as the slope of the function. The slope represents how much the plant is growing every day.

Thus, the slope of 0.21 implies that the plant is growing 0.21 cm every day.

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