2 years ago

The boss has to pick five people for the committee of 28 people. how many different ways can he choose the committe ?

Mathematics

1 answer:

stealth61 [152]2 years ago

8 0

The order does not matter (A,B,C same as B,C,A) so it's a combination 28 choose 5.

You might be interested in

Stan wants to start an IRA that will have $250,000 in it when he retires in 25 years. How much should he invest semiannually in

Alecsey [184]

$1,041,666.70 I'm not sure but that what I think the answer is

8 0

3 years ago

Suppose that surface σ is parameterized by r(u,v)=⟨ucos(3v),usin(3v),v⟩, 0≤u≤7 and 0≤v≤2π3 and f(x,y,z)=x2+y2+z2. Set up the sur

Bad White [126]

Looks like you have most of the details already, but you're missing one crucial piece.

$\sigma$ is parameterized by

$\vec r(u,v)=\langle u\cos3v,u\sin3v,v\rangle$

for $0\le u\le7$ and $0\le v\le\frac{2\pi}3$ , and a normal vector to this surface is

$\dfrac{\partial\vec r}{\partial u}\times\dfrac{\partial\vec r}{\partial v}=\left\langle\sin3v,-\cos3v,3u\right\rangle$

with norm

$\left\|\dfrac{\partial\vec r}{\partial u}\times\dfrac{\partial\vec r}{\partial v}\right\|=\sqrt{\sin^23v+(-\cos3v)^2+(3u)^2}=\sqrt{9u^2+1}$

So the integral of $f(x,y,z)=x^2+y^2+z^2$ is

$\displaystyle\iint_\sigma f(x,y,z)\,\mathrm dA=\boxed{\int_0^{2\pi/3}\int_0^7(u^2+v^2)\sqrt{9u^2+1}\,\mathrm du\,\mathrm dv}$

6 0

2 years ago

Camillo estimates the weight of his dog. The veterinarian says that the dog weighs 84 pounds. The percent error in Camillo's est

Makovka662 [10]

Answer:

A.Yes B.Yes C.No D.Yes E.No F.No

Step-by-step explanation:

10% of 84 is 8.4 and 84-8.4=76.6 and anything between 76.6-84 could have been the estimate.

7 0

2 years ago

You complete 3 centimeters of a necklace in an hour. each hour after the first, you triple the length iof the necklace. write an

liberstina [14]

First hour: 3 = 3¹

Second hour: (3) x 3 = 3²

Third hour: (3 x 3) x 3 = 3³

Fourth hour: (3 x 3 x 3) x 3 = 3⁴

Do you see the pattern? $3^{n}$ where n is the number of hours

Answer: 3³, $3^{n}$

5 0

2 years ago

Read 2 more answers

Simplify. 43 – 2 A 10 B 41 C 62 D 79

Zarrin [17]

the correct answer is, B.

8 0

2 years ago