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3 years ago

Jessica is packing her bags for her vacation. She has 9 unique Fabergé eggs, but only 3 fit in her bag.

1 answer:

3 0

The number of different groups can be found by finding 9C3 (Using combinations)
We will find combinations from n = 9 to r = 3

Therefore, 9C3 = 9!/6!*3! = (9*8*7*6!)/(6!*3*2)
= 3*4*7
= 84 ways.

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(3 5/9)÷(−2 2/3) help plz

Elza [17]

Answer:

-4/3

Step-by-step explanation:

3 5/9= 32/9 and -2 2/3=-8/3 So, 32/9 * -3/8=-4/3 :)

8 0

3 years ago

Read 2 more answers

On a normal day, I can walk from my house to school in three quarters of an hour. The return trip takes me the same amount of ti

Likurg_2 [28]

Answer:

208 1/8 hours

Step-by-step explanation:

The amount of time saved on each trip is ...

(3/4 h) - (1/4)(3/4 h) = (3/4)(3/4 h) = 9/16 h

There are 2×5×37 = 370 trips in the school year, so the total savings in time is about ...

370×(9/16 h) = 208 1/8 h

4 0

3 years ago

Electrons execute 1.4*10^6 revolutions per sec in a magnetic field of flux density

seropon [69]

The charge of the electrons is $8.02 \times 10^{-19} \ C$ .

The given parameters:

Number of revolution of the electron, N = 1.4 x 10⁶ rev per sec
Flux density, B = 10⁻⁵ T
Mass of electron, m = 9.11 x 10⁻³¹ kg

The angular speed of the electron is calculated as follows;

$\omega = 2\pi N\\\\\omega = 2\pi \ \frac{rad}{1 \ rev} \times 1.4 \times 10^6 \ rev/s\\\\\omega = 8.798 \times 10^6 \ rad/s$

The charge of the electrons is calculated as follows;

$F_c= m\omega ^2 r\\\\F_{B}= qvB = q\omega r B \\\\F_c = F_B\\\\m\omega ^2 r = q\omega r B \\\\q = \frac{m\omega ^2 r}{\omega r B} \\\\q = \frac{m \omega }{B} \\\\q = \frac{9.11 \times 10^{-31} \times 8.798 \times 10^6}{10^{-5}} \\\\q = 8.02 \times 10^{-19} \ C$

The charge of the electrons is $8.02 \times 10^{-19} \ C$ .

The complete question here:

Electrons execute 1.4*10^6 revolutions per sec in a magnetic field of flux density 10⁻⁵ T. What will be the value of charge of the electron?

Learn more about magnetic force of electrons here: brainly.com/question/3990732

8 0

2 years ago

Which bigger 0.80 or 0.08

nekit [7.7K]

0.80 because when you line up the decimals 0.80 is bigger

0.80
0.08

4 0

3 years ago

Read 2 more answers

A cylindrical oil drum has a diameter of 2 feet and a height of 3 feet what is the volume of the oil drum?

NikAS [45]

We know, Volume of a Cylinder = πr²h

Here, r = 2/2 = 1 ft
h = 3 ft

Substitute their values,
v = 3.14 * (1)² * 3
v = 9.42 ft³

In short, Your Answer would be: 9.42 Ft³

Hope this helps!

4 0

3 years ago