Find the total area round to the nearest 10th if

Ответ:

Baby010391

14.06.2021

$Total \:area\approx 290.5\: ft^2$

Step-by-step explanation:

Total area $=\frac {1}{2} \pi r_1^2 +\frac {1}{2} \pi r_2^2$

(where $r_1 = 22/2 = 11 \: ft, \: \:\:r_2 = (30-22)/2 = 4 \: ft$ )

$\therefore Total \:area=\frac {1}{2} \pi( r_1^2 + r_2^2)$

$\therefore Total \:area=\frac {1}{2} \times 3.14(11^2 + 8^2)$

$\therefore Total \:area=1.57(121 + 64)$

$\therefore Total \:area=1.57(185)$

$\therefore Total \:area=290.45\: ft^2$

$\therefore Total \:area\approx 290.5\: ft^2$

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dontcareanyonemo

25.05.2021

the direct variation says that:

$y \propto x$

then the equation is of the form is given by:

$y = kx$ where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

$3 = 2k$

divide both sides by 2 we get;

$k =\frac{3}{2} = 1.5$

⇒ $m(x) = 1.5x$

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

$m(x) = 1.5x$

$-1.5 = 1.5(-1)$

-1.5 = -1.5 true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

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