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2 years ago

7

Please help me and explain well!

1 answer:

Fynjy0 [20]2 years ago

8 0

Answer:

i can see the image

Step-by-step explanation:

brainliest me

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If you a 1hour long test and you have 10 question home many minutes would you spend on each question if you used the whole hour

lord [1]

Answer:

It would take you 10 minutes on each question. Answer is 10 minutes

Step-by-step explanation:

Because you have one hour to answer 10 questions and it should take you 10 minutes.

5 0

2 years ago

20 points Return to questionItem 4Item 4 20 points Police records in the town of Saratoga show that 13 percent of the drivers st

Sladkaya [172]

Answer:

a) 0.1423

b) 0.2977

c) 0.56

Step-by-step explanation:

For each driver stopped for speeding, there are only two possible outcomes. Either they have invalid licenses, or they do not. The probability of a driver having an invalid license is independent from other drivers. So we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

In this problem we have that:

13 percent of the drivers stopped for speeding have invalid licenses.

This means that $p = 0.13$

14 drivers are stopped

This means that $n = 14$

(a) None will have an invalid license.

This is $P(X = 0)$

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{14,0}.(0.13)^{0}.(0.87)^{14} = 0.1423$

(b) Exactly one will have an invalid license.

This is $P(X = 1)$

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 1) = C_{14,1}.(0.13)^{1}.(0.87)^{13} = 0.2977$

(c) At least 2 will have invalid licenses.

Either less than 2 have invalid licenses, or at least 2 does. The sum of the probabilities of these events is decimal 1. Mathematically, this is

$P(X < 2) + P(X \geq 2) = 1$

We want $P(X \geq 2)$

So

$P(X \geq 2) = 1 - P(X < 2)$

In which

$P(X < 2) = P(X = 0) + P(X = 1) = 0.1423 + 0.2977 = 0.44$

$P(X \geq 2) = 1 - P(X < 2) = 1 - 0.44 = 0.56$

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3 years ago

Helpppppppppppppppppppppppp

nexus9112 [7]

Answer: You divide the top row by itself and you multiply the top by 2 each time.

Step-by-step explanation: Multiply 72 by 2 each time on top and the bottom row just simply add 1.

Sorry if it is wrong but i hope it helps!

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3 years ago

Which of the lines in the picture is parallel to line l? Explain how you know.

Nadya [2.5K]

Answer:

line k is parallel

Step-by-step explanation:

because they will never intersect

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3 years ago

Help meh pls- 5x(20 divided by 4)to the power of 2

vagabundo [1.1K]

Answer:

125

Step-by-step explanation:

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3 years ago