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love history [14]
3 years ago
5

In a group 30 high school students 8 take french 12 take spanish and 3 take both languages.how many students of the group take n

either french or spanish?
Mathematics
2 answers:
Oliga [24]3 years ago
5 0
30 high school students
8 take french
12 take spanish
<span> 3 take both languages
Left who did'nt took any langueage= 30-(8+12+3)
                                                        =30-23
                                                        =7 stdents
</span>Therefore, 7 students took neither of the two languages.

HARRY POTTER FOREVER! XD
kozerog [31]3 years ago
3 0
3 take both...so 5 only take french and 9 only take spanish....

30 - (9 + 5 + 3) = 30 - 17 = 13 take neither
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Part 2) The surface area of the composite figure is 273\pi\ cm^{2}

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Step-by-step explanation:

Part 1) Find the volume of the composite figure

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V=\frac{1}{3} \pi r^{2} h

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<em>Find the volume of the hemisphere</em>

The volume of the hemisphere is equal to

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Part 2) Find the surface area of the composite figure

we know that

The surface area of the composite figure is equal to the lateral area of the cone plus the surface area of the hemisphere

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r=7\ cm

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substitute

LA=\pi(7)(25)

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<em>Find the surface area of the hemisphere</em>

The surface area of the hemisphere is equal to

SA=2\pi r^{2}

we have

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substitute

SA=2\pi (7)^{2}

SA=98\pi\ cm^{2}

Find the surface area of the composite figure

175\pi\ cm^{2}+98\pi\ cm^{2}=273\pi\ cm^{2}

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