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STatiana [176]
3 years ago
8

Please solve these for 20 points : solving formulas for a variable

Mathematics
1 answer:
Digiron [165]3 years ago
6 0
6. (A/pi = r^2)
7. [(P - 2l)/2 = w]
8. [C/(2pi)= r]
9. (2A/h = b)
10. (E/c^2 = m)
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Assume that when adults with smartphones are randomly​ selected, 52​% use them in meetings or classes. If 14 adult smartphone us
emmasim [6.3K]

The probability that fewer than 4 of then use their smart phones in meetings  or classes is 0.00030243747.

Step-by-step explanation:

Fewer than 4 means ,less than 4 which is any number less than 4 and not including 4. This is 3, 2,1 and 0. So you find the probability that exactly 3 of then use their smart phone, exactly 2 of them use their smart phones, exactly 1 of them use his/her smart phone and none of them.

Given that 52% use smartphones in meetings and classes =0.52

Thus the remaining 48% do not use smartphones in meetings and classes=0.48

For C(14,3) you will have "14 chose 3", number of ways of choosing 3 out of 14'

=(0.52)³ *(0.48)⁹=0.00019018714

For C(14,2) you will have "14 chose 2", number of ways of choosing 2 out of 14

=(0.52)²*(0.48)¹²=0.00004044841

For C(14,1) you will have "14 chose 1", number of ways of choosing 1 out of 14

=(0.52)¹*(0.48)¹³=0.000037337

For  C(14,0) you will have "14 chose 0", number of ways of choosing 0 out of 14

=(0.52)⁰*(0.48)¹⁴=1*0.00003446492=0.00003446492

The probability that fewer than 4 of them use their smartphones in meetings or classes will be

0.00019018714 +0.00004044841+0.000037337+ 0.00003446492=0.00030243747

Learn More

  • Binomial random variable https://brainly.in/question/10088120

Keywords : Probability, random variable, binomial distribution

#LearnwithBrainly

4 0
3 years ago
Can someone can help me plsssssss
Darina [25.2K]
The answer is letter A
8 0
3 years ago
Read 2 more answers
A rectangular shoebox has a volume of 728 cubic inches. The base of the shoebox measures 8 inches by 6.5 inches. How long is the
bagirrra123 [75]
Divide the volume by the two measures. 728 ÷ 8 = 91 ÷ 6.5 = 14 so, the shoe box is we inches long.
8 0
2 years ago
Each cube in this figure is a -millimeter cube. What is the total volume of the prism?
alekssr [168]

Answer:

  • D. 9 mm³

Step-by-step explanation:

<u>Given</u>

  • Dimension of the prism: 3x4x6
  • Side of each small cube: 1/2 mm

<u>Volume of the prism in terms of the number of small cubes:</u>

  • 3*4*6 = 72

<u>Volume of each unit cube:</u>

  • V = (1/2)³ = 1/8 mm³

<u>Volume of the prism:</u>

  • 72*1/8 = 9 mm³

Correct choice is D

7 0
2 years ago
Read 2 more answers
Use the imaginary number i to rewrite the expression below as a complex number. Simplify
Zinaida [17]

Step-by-step explanation:

Revin imediat...... ✨.

8 0
1 year ago
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