1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
blsea [12.9K]
3 years ago
7

How to verify this trig?

Mathematics
2 answers:
vlada-n [284]3 years ago
8 0

Answer:use the internet :)

Step-by-step explanation:

Anettt [7]3 years ago
3 0
I had that same answer, its on google just search it up.
You might be interested in
How do you estimate weight?
nlexa [21]
With lbs(pounds) I think
8 0
3 years ago
Read 2 more answers
A company is in the business of finding addresses of long-lost friends. The company claims to have a 70% success rate. Suppose t
Galina-37 [17]

Answer:

a) Figure attached

b) E(X) =\mu= np = 9*0.7=6.3

Sd(X) =\sigma= \sqrt{np(1-p)}= \sqrt{9*0.7*(1-0.7)}=1.375

c) For the case n= 6

P(X \leq 2) = 0.9891

For the case n= 5

P(X \leq 2) = 0.9692

So then we need at least  n=5 or n=6 to satisfy the condition required.

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

X \sim Binom(n=9, p=0.7)

The probability mass function for the Binomial distribution is given as:

P(X)=(nCx)(p)^x (1-p)^{n-x}

Where (nCx) means combinatory and it's given by this formula:

nCx=\frac{n!}{(n-x)! x!}

Part a

For this case we can use the following R code:

> x <- seq(0,9,by = 1)

> y <- dbinom(x,9,0.7)

> plot(x,y,main="Histogram",type = "h")

And we can see on the figure attached the solution.

We see that the higher probabilities are from 4 to 9

Part b

The expected value is given by:

E(X) =\mu= np = 9*0.7=6.3

The variance is given by:

Var (X) =\sigma^2= np(1-p) = 9*0.7*(1-0.7)= 1.89

And the standard deviation is:

Sd(X) =\sigma= \sqrt{np(1-p)}= \sqrt{9*0.7*(1-0.7)}=1.375

Part c

First we can find the probability that at least two addresses will be found in the list of 9 that we have like this:

P(X \geq 2)

We can use the complement rule and we have:

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

We find the indicidual probabilities:

P(X=0)=(9C0)(0.7)^0 (1-0.7)^{9-0}=0.00001968

P(X=1)=(9C1)(0.7)^1 (1-0.7)^{9-1}=0.000413

P(X \geq 2) = 1-[0.00001968+0.000413]=0.9996

If we use the case of n=8 and we find P(X\leq 2), we got:

P(X \leq 2) = 0.9987

For the case n= 7

P(X \leq 2) = 0.9962

For the case n= 6

P(X \leq 2) = 0.9891

For the case n= 5

P(X \leq 2) = 0.9692

So then we need at least  n=5 or n=6 to satisfy the condition required.

5 0
3 years ago
38 In the faculty parking lot of a school 21 out of 25.cars have four doors. What
Salsk061 [2.6K]

Answer:

c

Step-by-step explanation:

4 0
3 years ago
What is 24 percent of 25
Mkey [24]

6

24% = \frac{24}{100}

multiply 25 by this fraction

25 × \frac{24}{100} = \frac{25(24)}{100} = 6


4 0
3 years ago
Solve by elimination 3×+11y=4,-2×-6y=0
gizmo_the_mogwai [7]
3x + 11y = 4

2x + 6y = 0

I got
15/2, -5/4
6 0
3 years ago
Other questions:
  • At a baseball game, the probability that a fan brings a glove is 0.08. The probability that a fan is left-handed is 0.12. What i
    11·2 answers
  • A coyote can run up to 43 miles per hour while a rabbit can run up to 35 miles per hour.Write two equivalent expressions and the
    9·1 answer
  • What is 12x - 5 = 127
    13·1 answer
  • The polygon below represents a regular octagon.
    5·1 answer
  • Solve by elimination <br> 5x-2y=11 <br> -5x-3y=14
    7·1 answer
  • Help me please !
    14·2 answers
  • PLEASE HELP FAST! the volume of the box below is 1.5 cubic inch's. Which of the following are possible dimensions of the box?
    9·2 answers
  • The cost in dollars, y, to participate x days in a bike tour is a linear function. Lin's bike tour is described by the equation
    8·1 answer
  • toby's restaurant ordered $435.78 worth of supplies from a catalogue. Toby must pay 5.5% sales tax on this amount. How much sale
    13·1 answer
  • A, B, C, D are points on a line.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!