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3 years ago

7 cm 2 cm volume of cylinder

2 answers:

4 0

Round to the neatest cubic centimeter. The formula for the volume of a cylinder is V=Bh or V=πr2h . The radius of the cylinder is 8 cm and the height is 15 cm. Substitute 8 for r and 15 for h in the formula V=πr2h .

harina [27]3 years ago

4 0

Answer:

307.88

Step-by-step explanation:

V=πr2h

use this formula

easy peasy

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Yuri [45]

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3 years ago

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Solve the equation x^2-4x-9=29

PtichkaEL [24]

Answer:

x² - 4x - 9 = 29

x² - 4x - 9 - 29 = 0

x² - 4x - 38 = 0

Using the quadratic formula

$x = \frac{ - b± \sqrt{ {b}^{2} - 4ac } }{2a}$

Where

a = 1 , b = -4 c = - 38

So we have

$x = \frac{ - - 4± \sqrt{ { - 4}^{2} - 4(1)( - 38)} }{2(1)} \\ \\ x = \frac{4± \sqrt{16 +152 } }{2} \\ \\ x = \frac{4± \sqrt{168} }{ 2} \\ \\ x =2 ± \sqrt{42} \\ \\ \\ x = 2 + \sqrt{42} \: \: \: or \: \: \: x = 2 - \sqrt{42}$

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4 0

3 years ago

Ben left a 20% tip on his bill at a restaurant. The bill was $40

tigry1 [53]

Answer:

Tip: $8

Total:$48

Step-by-step explanation:

Multiply 40 by 20% to find out how much money he gave for tip.

Add the amount of tip, 8, to $40 find out the total amount of money he spent.

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3 years ago