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Ann [662]
3 years ago
9

Help me with this question

Mathematics
1 answer:
MaRussiya [10]3 years ago
6 0

Answer:


Step-by-step explanation:


In kilograms, just move the decimal right before the first digit and multiply it by ten to the power of how many times you moved the decimal:

6.20 x 10^6

In grams, change 6,200,000 kg to g.  One kg is 1000 g, so divide  6,200,000 by 1000.  This would equal 6200 g.  Now, move the decimal right before the first digit and multiply it by ten to the power of how many times you moved the decimal:


6.20 x 10^3

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nasty-shy [4]

Answer:

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7 0
3 years ago
Hot dogs at a carnival cost $2.99 each plus 7% tax. What is the total cost for one hot dog?
marysya [2.9K]
$2.99 + 7% of $2.99 =

= $2.99 + 7% * $2.99

= $2.99 + 0.07 * $2.99

= $2.99 + $0.21

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4 0
3 years ago
Read 2 more answers
Some transportation experts claim that it is the variability of speeds, rather than the level of speeds, that is a critical fact
scZoUnD [109]

Answer:

Explained below.

Step-by-step explanation:

The claim made by an expert is that driving conditions are dangerous if the variance of speeds exceeds 75 (mph)².

(1)

The hypothesis for both the test can be defined as:

<em>H</em>₀: The variance of speeds does not exceeds 75 (mph)², i.e. <em>σ</em>² ≤ 75.

<em>Hₐ</em>: The variance of speeds exceeds 75 (mph)², i.e. <em>σ</em>² > 75.

(2)

A Chi-square test will be used to perform the test.

The significance level of the test is, <em>α</em> = 0.05.

The degrees of freedom of the test is,

df = n - 1 = 55 - 1 = 54

Compute the critical value as follows:

\chi^{2}_{\alpha, (n-1)}=\chi^{2}_{0.05, 54}=72.153

Decision rule:

If the test statistic value is more than the critical value then the null hypothesis will be rejected and vice-versa.

(3)

Compute the test statistic as follows:

\chi^{2}=\frac{(n-1)\times s^{2}}{\sigma^{2}}

    =\frac{(55-1)\times 94.7}{75}\\\\=68.184

The test statistic value is, 68.184.

Decision:

cal.\chi^{2}=68.184

The null hypothesis will not be rejected at 5% level of significance.

Conclusion:

The variance of speeds does not exceeds 75 (mph)². Thus, concluding that driving conditions are not dangerous on this highway.

7 0
3 years ago
Need help with this questions
leva [86]
1. Total
2. Deficit
( hope this helps)
4 0
3 years ago
Why is the quotient -100/(-5) the same as the quotient 100/5
Tatiana [17]

Answer:The quotient of -100 and -5  is the same as the quotient of 100/5 because if you divide a negative number by a negative number, you will get a positive number and the same way if you divide a positive number by a positive number you will get a positive number.

Step-by-step explanation:

-100/-5 = 20

100/5 = 20

8 0
3 years ago
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