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Jobisdone [24]
2 years ago
15

Reduce 21/24 What is the answer to this?

Mathematics
1 answer:
german2 years ago
4 0

Answer:

7/8 or 0.875

Step-by-step explanation:

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What is the simplified form of (3.25*10^3)(7.8*10^6) written in scientific notation
Viefleur [7K]
<span>(3.25*10^3)(7.8*10^6)
=</span><span>(3.25 x 7.8) x 10^9
=25.35 </span> x 10^9
=2.535  x 10^10
<span>
answer: </span>2.535  x 10^10<span>

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3 0
2 years ago
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Based on the graph, what was the average speed, in miles per minute, of the train during the interval of 30 to 40 minutes?
Olegator [25]

Answer: 35 miles

Step-by-step explanation:

7 0
3 years ago
A study by Consumer Reports showed that 64% of supermarket shoppers believesupermarket brands to be as good as national brands.
Elina [12.6K]

Answer:

z=\frac{0.614 -0.64}{\sqrt{\frac{0.64(1-0.64)}{145}}}=-0.652  

The p value would be given by:

p_v =P(z  

Since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true proportion is significantly less than 0.64 at 5% of significance

Step-by-step explanation:

Information given

n=145 represent the random sample taken

X=89 represent the number  of people who believed the supermarket brand was as good as the national brand

\hat p=\frac{89}{145}=0.614 estimated proportion of people who believed the supermarket brand was as good as the national brand

p_o=0.64 is the value to test

\alpha=0.05 represent the significance level

z would represent the statistic

p_v represent the p value

Hypothesis to test

We want to test if the true proportion is less than 0.64, the system of hypothesis are.:  

Null hypothesis:p \geq 0.64  

Alternative hypothesis:p < 0.64  

The statistic is given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing the info we got:

z=\frac{0.614 -0.64}{\sqrt{\frac{0.64(1-0.64)}{145}}}=-0.652  

The p value would be given by:

p_v =P(z  

Since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true proportion is significantly less than 0.64 at 5% of significance

5 0
3 years ago
I need help with those 2
galina1969 [7]
Question 7 is a, multiply ever number by 5
question 8 is also a, multiply every number by -2
7 0
2 years ago
What is the point-slope equation of a line if the slope is 3 and it passes through the point (-9, 2
Art [367]

Answer:

The point-slope equation of the line is y - 2 = 3(x + 9)

Step-by-step explanation:

The form of the point-slope equation is y - y1 = m(x - x1), where

  • m is the slope of the line
  • (x1, y1) is a point on the line

∵ The slope of a line is 3

∴ m = 3

∵ The line passes through point (-9, 2)

∵ x1 = -9

∴ y1 = 2

→ Substitute the values of m, x1, and y1 in the point-slope form

∵ y - y1 = m(x - x1)

∴ y - 2 = 3(x - (-9))

→ Remember (-)(-) = (+)

∴ y - 2 = 3(x + 9)

∴ The point-slope equation of the line is y - 2 = 3(x + 9)

6 0
3 years ago
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