3 years ago

What’s the surface area of this shape?

Mathematics

1 answer:

AlexFokin [52]3 years ago

5 0

Do 13 times 14 times 13 times 5 and then divide by however many sides there are on the shape . I think

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40. A triangle is placed inside of a circle of radius 3x. The base of the

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Step-by-step explanation:

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IrinaVladis [17]

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Step-by-step explanation:

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3 years ago

How many ways can a dance instructor send 4 of her 11 students to a summer dance program?

Sedaia [141]

Answer:

d) 330

Step-by-step explanation:

The number of ways can a dance instructor send 4 of her 11 students to summer dance program is C(11 , 4)

That is $11_{C_{4} }$ ways

by using formula $n_{C_{r} } = \frac{n!}{(n-r)!r!}$

now simplification

$11_{C_{4} } = \frac{11!}{(11-4)!4!}$

= $\frac{11X10X9X8X7!}{(7!)4X3X2X1}$

after cancelling 7! and on simplification

= $\frac{11X10X9X8}{4X3X2X1}$

after cancellation we get 330 ways

The number of ways can a dance instructor send 4 of her 11 students to summer dance program is 330

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