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3 years ago

A cylinder is shown. Use 3.14 as the value of pi 7 mm for radius 11 mm for height

Mathematics

2 answers:

lutik1710 [3]3 years ago

8 0

Answer:

V≈1693.32

Step-by-step explanation:

V=πr2h=π·72·11≈1693.31844 plz give the brainliest

sukhopar [10]3 years ago

5 0

Answer:

Volume is 1,692.46

Step-by-step explanation:

pi(r^2)(h), 3.14(49)(11)

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Answer:

First image attached

The error was done in Step E, because student did not multiply $2\cdot x -8$ by the negative sign in numerator. Step E must be $\frac{2\cdot x -5}{(x+4)\cdot (x-4)}$ .

Second image attached

The error was done in Step C, because the student omitted the $2\cdot a \cdot b$ of the algebraic identity $(a+b)^{2} = a^{2}+2\cdot a\cdot b +b^{2}$ . Step C must be $5\cdot x = x^{2}+4\cdot x + 4$

Step-by-step explanation:

First image attached

The error was done in Step E, because student did not multiply $2\cdot x -8$ by the negative sign in numerator. The real numerator in Step E should be:

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Hence, Step E must be $\frac{2\cdot x -5}{(x+4)\cdot (x-4)}$ .

Second image attached

The error was done in Step C, because the student omitted the $2\cdot a \cdot b$ of the algebraic identity $(a+b)^{2} = a^{2}+2\cdot a\cdot b +b^{2}$ . Step C must be $5\cdot x = x^{2}+4\cdot x + 4$

And further steps are described below:

Step D

$x^{2}-x+4 = 0$

Which according to the Quadratic Formula, represents a polynomial with complex roots. That is: ( $a = 1$ , $b = -1$ , $c = 4$ )

$D = b^{2}-4\cdot a\cdot c$

$D = (-1)-4\cdot (1)\cdot (4)$

$D = -17$ (Conjugated complex roots)

Step E

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Step F

$x = 0.5+i\,1.936\,\lor\,x = 0.5-i\,1.936$

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3 years ago

A cylinder is shown. Use 3.14 as the value of pi 7 mm for radius 11 mm for height​

A cylinder is shown. Use 3.14 as the value of pi 7 mm for radius 11 mm for height