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bogdanovich [222]

3 years ago

12

If n = 4, what is the value of 6n - 3

1 answer:

Arturiano [62]3 years ago

3 0

Answer: 21
steps:
1) 6(4) - 3
2) 24 - 3
3) 21

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The figure shows the layout of a symmetrical pool in a water park. What is the area of this pool rounded to the tens place? Use

k0ka [10]

Answer:

$2489ft^{2}$

Step-by-step explanation:

The pool are is divided into 4 separated shapes: 2 circular sections and 2 isosceles triangles. Basically, to calculate the whole area, we need to find the area of each section. Due to its symmetry, both triangles are equal, and both circular sections are also the same, so it would be enough to calculate 1 circular section and 1 triangle, then multiply it by 2.

<h3>Area of each triangle:</h3>

From the figure, we know that <em>b = 20ft </em>and <em>h = 25ft. </em>So, the area would be:

$A_{t}=\frac{b.h}{2}=\frac{(20ft)(25ft)}{2}=250ft^{2}$

<h3>Area of each circular section:</h3>

From the figure, we know that $\alpha =2.21 radians$ and the radius is $R=30ft$ . So, the are would be calculated with this formula:

$A_{cs}=\frac{\pi R^{2}\alpha}{360\°}$

Replacing all values:

$A_{cs}=\frac{(3.14)(30ft)^{2}(2.21radians)}{6.28radians}$

Remember that $360\°=6.28radians$

Therefore, $A_{cs}=994.5ft^{2}$

Now, the total are of the figure is:

$A_{total}=2A_{t}+2A{cs}=2(250ft^{2} )+2(994.5ft^{2})\\A_{total}=500ft^{2} + 1989ft^{2}=2489ft^{2}$

Therefore the area of the symmetrical pool is $2489ft^{2}$

3 0

3 years ago

Heyy! i’ll give brainliest please help.

Murrr4er [49]

Answer:

thought i had it but answer is B......

6 0

3 years ago

What is the surface area of the rectangle pyramid below?

iren [92.7K]

Answer:

Um.. where's the picture?... wheres the rectangle and the measurements.

7 0

3 years ago

There are 3000 people at a concert you survey a random sample of 200 people and find that for 35 of them this is their first con

Ipatiy [6.2K]

Ok so
ratio
35/200=x/3000
7/40=x/3000
multiply both sides by 12000
2100=4x
divide both sides by 4
525=x

aprox 525 people

6 0

3 years ago

A card player selects a playing card from a well-shuffled deck of standard playing cards and sees if the card is a red card or n

dmitriy555 [2]

Answer:

A

Step-by-step explanation:

there could be no red cards inside

8 0

3 years ago