2 years ago

Simplify: (2-2x5-5)-4

Mathematics

1 answer:

Pavlova-9 [17]2 years ago

7 0

Answer:

(2*5^2)+4/3^2-5

(2*25)+4/3^2-5

50+4/3^2-5

50+1.7-5

46.7

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x + ¼ + ¼ + 1/5 = 1

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2 years ago

38. What is the surface area of a conical grain storage tank that has a height of 62 meters and a diameter of 24 meters? Round t

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1. The surface area of a cone S is S= $\pi r^{2}+ \pi rl$ , where r is the radius of the base and l is the slant height.

2. The slant height l is found as follows:

$l^{2}= OC^{2}+ OB^{2}$
$l^{2}= 12^{2}+ 62^{2}=144+3844=3988$

$l= \sqrt{3988}=63.15$

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$A=\pi r^{2}+ \pi rl=3.14(12)^{2}+3.14*12*63.15
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$= 452.16+2379.492 =2831.652 ( m^{2} )$

$= 452.16+2379.492 =2831.652 ( m^{2} )$

4. The answer is C