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2 years ago

Please help me with this and answer correctly pleaseeeeee!!!!!

Mathematics

1 answer:

Marta_Voda [28]2 years ago

5 0

Answer:

7 m

Explanation:

diameter = 12 m, radius = 6 m, volume of cone: $\sf \frac{1}{3} \pi r^2 h$

solve:

$\hookrightarrow \sf \frac{1}{3} \pi r^2 h = 264$

$\hookrightarrow \sf \frac{1}{3} \pi (6)^2 h = 264$

$\hookrightarrow \sf \pi (6)^2 h =792$

$\hookrightarrow \sf h =\dfrac{792}{ \pi (6)^2}$

$\hookrightarrow \sf h = 7$

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ra1l [238]

Answer: " x = 12 " .

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Step-by-step explanation:

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<u>Note</u>: If 2 (two) triangles are "similar" ; then their corresponding sides are "proportional".

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Since one of the sides [the "hypotenuse"] of one the triangles given ; shows the measurement containing an expression with a value of "x" — specifically; " 6x + 28 " ;

→ And since we want to solve for the value of "x" ; we use this "hypotenuse" of said particular triangle to set up a "proportion" with corresponding sides; so we can solve for "x" :

→ Set up proportions as a "ratio" ; or fraction:

→ 7:28::25:(6x + 28) ; Solve for "x" ;

Let us write this in the form of a "fraction" :

→ $\frac{7}{28} = \frac{25}{(6x+28)}$ ;

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<u>Note</u>:

→ Rewrite: " $\frac{7}{28}$ " ; by simplifying to:

" $\frac{1}{4}$ " ;

________________________________________________

→ Since: " $\frac{7}{28}$ " ;

= " (7÷7) / (28÷7) " ;

= " (1 /4) " ;

= " $\frac{1}{4}$ " .

________________________________________________

Now, rewrite the "proportion" ; as follows:

________________________________________________

$\frac{1}{4} = \frac{25}{(6x+28)}$ ;

________________________________________________

Now: "Cross multiply" ; that is:

______________________________________

→ Given: " $\frac{a}{b} = \frac{c}{d}$ " ;

and: " b $\neq$ 0 " ; " d $\neq$ 0 " ;

→ Then: " a * d " = " b * c " .

________________________________________________

Likewise: " 1(6x + 28) = (4) * (25) " ;

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SImplify: " 6x + 28 = 100 " ; Solve for "x" ;

→ Subtract "28" from each side of the equation:

→ " 6x + 28 - 28 = 100 - 28 " ;

to get: → " 6x = 72 " ;

Now, divide each side of the equation by: " 6 " ;

to isolate "x" on one side of the equation; & to solve for "x" ; as follows:

→ " 6x = 72 " ;

→ 6x / 6 = 72 / 6 ;

to get:

→ " x = 12 " ;

→ which is the answer.

______________________________________________

Hope this helps!

Best wishes in your academic pursuits

— and within the "Brainly" community!

______________________________________________

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3 years ago