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3 years ago

A computer randomly picks a number from the group 75, 76, 77, 78, 79.

Mathematics

2 answers:

Scilla [17]3 years ago

5 0

2/5 or 0.4 Because only two of the five numbers are even or greater than 78

Alex3 years ago

5 0

3/5 because there is one number higher than 78 and (76,and 78) are even number so there are 2 possibilities out of 5 .

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An arithmetic sequence is given below.

Mashcka [7]

Given that $a_1=24$ and $a_2=17$ , if $a_n$ is an arithmetic sequence, then the common difference between successive terms is $d=a_2-a_1=17-24=-7$ .

You then have

$a_2=a_1+d$
$\implies a_3=a_2+d=a_1+2d$
$\implies a_4=a_3+d=a_1+3d$
$\implies \cdots\implies a_n=a_{n-1}+d=\cdots=a_1+(n-1)d$

So the explicit formula for the $n$ th term is

$a_n=24-7(n-1)$

3 0

3 years ago

In the largest clinical trial ever conducted, 401,974 children were randomly assigned to two groups. The treatment group consis

BARSIC [14]

Answer:

The requirements for the hypothesis test does satisfied the method for testing the claim that from two population proportions the rate of polio is less for children given the salk vaccine.

Step-by-step explanation:

The percentage of children in the treatment group was:

(201229/401974)*100 = 49.9%

The percentage of children given placebo was:

(200745/401974)*100 = 50.1%

The percentage of children that developed polio in the treatment group:

(33/200745)*100 = 0.0164%

The percentage of children that developed polio in the placebo group:

(115/201229)*100 = 0.0571%

The percentage difference between the two group:

((0.0571-0.0164)/0.0571) = 61.62%

Therefore:

The amount of children used for each group was almost divided into half of the total amount of children. The test revealed although very small percentages of the both group developed polio, 68.62% more children given placebo than the children that was given the salk vaccine. Therefore, the study shows that the rate of polio is less for children given the salk vaccine and the the hypthesis test is satisfied.

6 0

2 years ago

Plz help I don’t know the answer

Dahasolnce [82]

Are there options for the answers or not? If there is add the options.

5 0

2 years ago

How do you draw a net of a rectangular and triangular prism?

guapka [62]

Answer:

here are 4 different types of prisms

Step-by-step explanation:

7 0

2 years ago

Darrin graphs the following inequality: y > -3x -5. Does the side of the line with all solutions (the shaded region) include

Anarel [89]

Yes it does include the test point (0, 0)

equation: y > -3x -5

<h3>Find y-intercept:</h3>

y > -3(0) -5

y > -5

<h3>Find x-intercept:</h3>

y > -3x -5

<u>switch sides</u>

-3x - 5 < 0

-3x < 5

<u>Multiply both sides by -1 reverses the inequality</u>

x > -5/3

Thus, the following (0, 0) comes under the following x > -5/3 and y > -5

3 0

2 years ago