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2 years ago

La la laaaaa don't answer just for the points -_-

Mathematics

2 answers:

dem82 [27]2 years ago

7 0

<h3>given:</h3>

$d = 7 \: ft$

the circumference of the circle.

<h3>solution:</h3>

$c = \pi \: d$

$3.14 \times 7$

$= 21.98 \: ft$

hence, the circumference of the circle is 21.98 feet.

answer= option 4

Amiraneli [1.4K]2 years ago

6 0

Answer:

$\sf C=21.99~ft.$

__________

$\sf Steps$

$\sf Given~the~diameter~is~7~ft...$

$\sf We~know~we~must~use~diameter-to-circumference~formula$

$\sf Formula:$ $\pi d = \pi * (diameter) = [Circumference]$

__________

$\sf Solve$

$\pi * 7 = 21.99~ft.$

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zepelin [54]

Answer:

Answer in terms of a trigonometric function :

$h = \frac{20tan(19.9)}{0.4-tan(19.9)}$

Answer in figures

$h = 190.5 feet$

Step-by-step explanation:

Consider the sketch attached below to better understand the problem.

Let x be the distance between point B and the base of the water tower.

$tan (19.9)=\frac{h}{50+x} ---------------equation 1\\$

$tan (21.8)=\frac{h}{x}----------------equation 2$

From equation 2,

$x =\frac{h}{tan21.8}=\frac{h}{0.4}$

substituting the value of x into equation 1, we get

$tan (19.9)=\frac{h}{50+(\frac{h}{0.4} )}$

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cross multiplying,

$20\times tan(19.9) +htan(19.9)=0.4h$

$20tan(19.9)= h(0.4-tan(19.9))$

$h= \frac{20tan (19.9)}{0.4-tan (19.9)}$

The height of the tower is $h= \frac{20tan (19.9)}{0.4-tan (19.9)}$ in terms of the trig function "Tan"

The equation can simply be evaluated to get the answer in figures since the angles are given in the question

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3 years ago

A trail around a river is 3 1/4 miles long. What is the length, in feet, of the trail?

bezimeni [28]

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Step-by-step explanation:

We know that 5280 feet = 1 mile

So all we have to do is multiply 3 1/4 by 5280

Let's split the 3 and 1/4 up to make the multiplication easier

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2 years ago

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Answer:

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The question seems to be asking about the growth factor in the given exponential function.

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f(x) = 58 × 1.6^x

we see the "growth factor" is 1.6. This is the multiplier from one interval (year) to the next.

Each year the expected number of birds is 1.6 times the number the year before.

Additional comment

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3 years ago

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