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Sindrei [870]
3 years ago
9

If you graph a function and it looks like a circle, it will pass the vertical line test.

Mathematics
1 answer:
fgiga [73]3 years ago
4 0

Answer: false

Step-by-step explanation:

Since it is a circle, when you draw the line it will meet at two points which fails the vertical line test. In order to pass the vertical line test it must only meet at one point.

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A 10 2/3 inch long pipe is cut into 8 equal length pieces.how long is each piece?
quester [9]
The answer is 1.33333333
Rounded off to 1.34
3 0
3 years ago
Read 2 more answers
In the Salk vaccine field trial, 400,000 children were part of a randomized controlled double-blind experiment. Just about half
EastWind [94]

Answer:

Step-by-step explanation:

From the given information:

The number of children that were randomly allocated to each vaccination group; n₁ = 200,000

No of polio cases X₁ = 57

Now, in the vaccine group:

the proportion of polio cases is:

\hat p_1 = \dfrac{57}{200000}

=  0.000285

The number of children that were randomly allocated to the placebo group, n₂ = 200,000

No of polio cases X₂ = 142

In the placebo group

the proportion of polio cases is:

\hat p_2 = \dfrac{142}{200000}

Null and alternative hypothesis is computed as follows:

H₀: There is no difference in the proportions of polio cases between both groups.  

H₁: There is a difference in the proportions of polio cases between both groups.

Let assume that the level of significance ∝ = 0.05

The test statistic  can be computed as:

Z = \dfrac{\hat p_1-\hat p_2}{\sqrt{\dfrac{\hat p_1 \hat q_1}{n_1}+ \dfrac{\hat p_2 \hat q_2}{n_2}}}

Z = \dfrac{0.000285-0.000710}{\sqrt{\dfrac{0.000285(1-0.000285)}{200000}+ \dfrac{0.000710(1-0.000710)}{200000}}}

Z = \dfrac{-4.25\times 10^{-4}}{\sqrt{\dfrac{0.000285(0.999715)}{200000}+ \dfrac{0.000710(0.99929)}{200000}}}

Z = - 6.03

P-value =  2P(Z < -6.03)

From the Z - tables

P-value =  2 × 0.0000

= 0.000

We reject the H₀ provided that P-value is very less.

Therefore, we may conclude that there is a difference in the proportions of polio cases between the vaccine group and placebo group not due to chance.

7 0
3 years ago
What is <br>y=3x-4and y=x-2
IrinaVladis [17]

Answer:

x= 1

y= -1

Hope this helps!  

Step-by-step explanation:

1 Substitute y=3x−4 into y=x-2

3x-4=x-2

2 Solve for x in 3x-4=x-2

x=1

3 Substitute x=1 into y=3x-4

y=-1

4 Therefore,

x=1

y=-1

3 0
3 years ago
The volume of a cone is 28.26cm cubed. The radius and height of the cone are equal. What is the radius of the cone? Use 3.14 for
HACTEHA [7]

Answer:

Step-by-step explanation:

Tree

8 0
3 years ago
All questions u may have to click the picture
jonny [76]
1. u must simplify 3^2 first because the order of operations states that u have to do exponents before subtraction.

2. 12 - 3^2 = 81......she subtracted the 3 first....12 - 3^2 = 9^2 = 81...which is an incorrect answer

3. u do not divide before simplifying 3^2.....order of operations states that u have to do exponents before division

4. no.....(12 - 3)^2 ......order of operations states that u do parenthesis before exponents...so (12 - 3)^2 = 9^2 = 81
5 0
3 years ago
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