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3 years ago

Brainliest gets the win, and the crown! :) Wrong answers will be flagged.

Mathematics

1 answer:

fredd [130]3 years ago

4 0

$A = πr² \\ A = \frac{22}{7} \times {5}^{2} \\ = \frac{22}{7} \times 25 \\ =78.5714286\:cm²$

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A cylinder has volume 78 cm³. What is the volume of a cone with the same radius and height?

OleMash [197]

Answer:

The volume of the cone is $26\ cm^{3}$

Step-by-step explanation:

we know that

The volume of a cylinder is equal to

$V=\pi r^{2}h$

In this problem we have that

$V=78\ cm^{3}$

$78=\pi r^{2}h$ -----> equation A

The volume of a cone with the same radius and height is equal to

$V=\frac{1}{3}(\pi r^{2}h)$ -----> equation B

Substitute equation A in equation B

$V=\frac{1}{3}(78)$

$V=26\ cm^{3}$

6 0

4 years ago

What is 4 3/4 + 7/8 showing all work

Mekhanik [1.2K]

$4 \frac{3}{4} + \frac{7}{8}$

Convert mixed numbers to improper fractions

$= \frac{19}{4} + \frac{7}{8}$

Find de LCD for 4 and 8 :

Factor each denominator into its primes:

$4 = 2^2
$

$8 = 2^3$

Find the least common denominator $2^3 = 8$

Adjust fractions based on the LCD :

$\frac{19*2}{8} + \frac{7}{8}$

Since the denominators are equal , combine the fractions:

$\frac{2*19+7}{8}$

$\frac{38+7}{8}$

$= \frac{45}{8}$

Therefore:

Convert improper fractions to mixed numbers

$= 5 \frac{5}{8}$

hope this helps!

7 0

3 years ago

Mike kohl, an employee of spotswood company, has gross earnings for the month of october of $8,000. fica taxes are 7.65% of gros

boyakko [2]

Gross earning = $8,000
FICA tax = 8000*0.0765 = $612
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Net pay = 8000-2062 = $5,938

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3 years ago

How can you solve y=3x+2 and -4x+2y=8 with substitution

seraphim [82]

Well, I can't explain how to solve but the answer is (2,8)

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3 years ago

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What is the volume of a cube with sides 5 cm long?

MA_775_DIABLO [31]

Its C.125 is the correct answer...

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3 years ago