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9966 [12]
3 years ago
12

Can i get help plz its not hard

Mathematics
1 answer:
Sergio [31]3 years ago
5 0

Answer:

1237 cubic feet

Step-by-step explanation:

First find the radius of the top D/2=r * r * pi

so 15/2=7.5*7.5*3.14=176.625

then multiply that by the height: 176.625*7=1236.375

So the volume of this figure is 1237 cubic feet!

Hope this helps!! :)

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. A regular hexagon is composed of 12 congruent 30 o -60 o -90 o triangles. If the length of the hypotenuse of one of those tria
sergey [27]

see  the attached figure to better understand the problem

Let

2L---------> lenght side of hexagon


we know that

in one of those triangles

sin 30=1/2

sin 30=L/hypotenuse

solve for L

L=hypotenuse*sin 30-------->L=( 1 8 √ 3 )*(1 /2)------> L=9√3 units


Find the perimeter

perimeter=(2L)*6--------> L*12-------> Perimeter=9√3*12--------->108√3 units


therefore


the answer is

the perimeter of the regular hexagon is 108√3 units

5 0
4 years ago
Rosalie is organizing a circus performance to raise money for a charity. She is trying to decide how much to charge for tickets.
Ray Of Light [21]

Answer:

she should charge $7.395 per ticket in order to make the most money.

Step-by-step explanation:

From the given information:

If Rosalie charges $5   then 1175 people will attend the circus performance

If Rosalie charges $7   then 935 people will attend the circus performance

Let x be the cost and y to be the number of people that will attend the performance . Then, we will have two points which are;

(5, 1175) and (7, 935)

The slope(m) of this points = \dfrac{\Delta y}{\Delta x}

= \dfrac{y_2-y_1}{x_2-x_1}

=\dfrac{935-1175}{7-5}

Slope (m) = \dfrac{-240}{2}

Slope (m) = -120

However; we can now have the linear equation:

y-y_1 = m(x-x_1)

y-1175= -120(x-5)

y-1175= -120x+600

y= -120x+600+1175

y= -120x+1775

The linear function is : y = -120x + 1775

Now; the total amount of money she can now earn is:

f(x) = xy

f(x) = x(-120x + 1775)

f(x) = -120x² + 1775x

The above expression is a quadratic equation; Using the quadratic formula; we have:

=\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}

where; a = -120 ; b = +1775 and c = 0

=\dfrac{-(1775) \pm \sqrt{(1775)^2-4(-120)(0)}}{2(-120)}

=\dfrac{-(1775) +  \sqrt{(1775)^2-4(-120)(0)}}{2(-120)}  \ \ \ \ \ OR  \ \ \ \  \dfrac{-(1775) -\sqrt{(1775)^2-4(-120)(0)}}{2(-120)}

=\dfrac{-(1775) +  \sqrt{(1775)^2}}{(-240)}  \ \ \ \ \ OR  \ \ \ \  \dfrac{-(1775) -\sqrt{(1775)^2}}{(-240)}

=\dfrac{-(1775) +  (1775)}{(-240)}  \ \ \ \ \ OR  \ \ \ \  \dfrac{-(1775) - (1775)}{(-240)}

=\dfrac{0}{(-240)}  \ \ \ \ \ OR  \ \ \ \  \dfrac{-3550}{(-240)}

=     0        OR         14.79

Since; we are considering the value greater than zero

x = 14.79

maximum value of x = 14.79/2 = 7.395

Thus ; she should charge $7.395 per ticket in order to make the most money.

6 0
3 years ago
A house plan Is drawn to a scale 1cm to 2m. What is the length of a window 2.5cm long on the plan?
slamgirl [31]

1cm = 2m

=> 1cm = 200cm

2.5cm = 2.5 × 200cm = 500 cm = 5m

So, the length of window is 500cm or 5m.

8 0
3 years ago
A personal financial plan should have _____.
kodGreya [7K]

A. Goals, budget, loan information, insurance plan, and a saving and investing plan.

6 0
3 years ago
Read 2 more answers
Yesterday, Jack drove 35 1/2 miles used 1 1/4 gallons of gasoline. What is the unit rate for miles per gallon?
insens350 [35]

Answer:

28.4 miles/gallon

Step-by-step explanation:

to find the answer, you need to find the constant by dividing the miles drove by the amount of gasoline (or the other way around in terms of wording if it is not correct grammar) So you need to do 35.5/1.25 .  FYI I converted the fraction to decimal. The answer is 28.4 miles/gallon.

Hope this helped!! :)

7 0
3 years ago
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