Directions: Simplify the following expressions. 2) 3 1) (402) - (611)

Mathematics

2 answers:

Over [174]3 years ago

8 0

Answer:

(40 x 2) - (6 x 11) (80 - 66) = 14

Aleksandr [31]3 years ago

5 0

Answer:

[40 × 2] - [6 × 11]

[80]-[66]

80-66

=14

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Help me math ......??.. Note ; l want answer true..only

Nana76 [90]

Area of small circle = PI x r^2
r = 1/2 the diameter ( 1/2 * 3 = 1.5)

3.14 x 1.5^2 = 7.065 square cm

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the area for the large circle = PI x r^2
the radius of the large circle is 3 cm

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11111nata11111 [884]

$\bf \textit{volume of a cone}\\\\ V=\cfrac{\pi r^2 h}{3}~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ r=23.9\\ h=100 \end{cases}\implies V=\cfrac{\pi (23.9)^2(100)}{3} \\\\\\ V=\cfrac{57121\pi }{3}\implies V\approx 59816.97\implies \stackrel{\textit{rounded up}}{V=59817} \\\\[-0.35em] ~\dotfill$

now, for the second one, we know the diameter is 10, thus its radius is half that or 5.

$\bf \textit{volume of a cone}\\\\ V=\cfrac{\pi r^2 h}{3}~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ r=5\\ V=225 \end{cases}\implies 225=\cfrac{\pi (5)^2 h}{3}\implies 225=\cfrac{25\pi h}{3} \\\\\\ \cfrac{225}{25\pi }=\cfrac{h}{3}\implies \cfrac{9}{\pi }=\cfrac{h}{3}\implies \cfrac{27}{\pi }=h\implies 8.59\approx h\implies \stackrel{\textit{rounded up}}{8.6=h}$