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Black_prince [1.1K]
3 years ago
12

Complete the equation 9/4= ? ÷ by 4

Mathematics
1 answer:
Stells [14]3 years ago
8 0

Answer:

9

Step-by-step explanation:

9/4 can be said as "9 divided by 4", so the ? is 9.

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If you choose two blocks at the same time, what is the probability that both blocks will
Murljashka [212]

Step-by-step explanation:

Numer of events divided by total number of events.

number of events = two ( since T is only 2)

total number of events = 12 ( count all of them)

so the probability is = 2/12 which is = 1/6.

Hope this helps.

Good luck ✅.

6 0
2 years ago
Reduce a<br> to lowest terms.<br> [?]72/81
elena55 [62]

Answer:

8/9

Hope it helps :)

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3 years ago
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Multiply: (6x - 1)(6x +1)
Salsk061 [2.6K]
I’m not positive but i think it’s 36x^2 -1
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3 years ago
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A research engineer for a tire manufacturer is investigating tire life for a new rubber compound and has built 16 tires and test
frutty [35]

Answer:

The 95% confidence interval for mean tire life is between 52,368.4 kilometers and 67,911 kilometers.

Step-by-step explanation:

We are in posession of the sample's standard deviation, so we use the students t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 16 - 1 = 15

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 15 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.68

The margin of error is:

M = T*s = 2.1315*3645.94 = 7771.3

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 60139.7 - 7771.3 = 52,368.4.

The upper end of the interval is the sample mean added to M. So it is 60139.7 + 7771.3 = 67,911.

The 95% confidence interval for mean tire life is between 52,368.4 kilometers and 67,911 kilometers.

3 0
3 years ago
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What is the prime factorization for 900 i just need the answer i got to turn in in like 2 minute ​
Tomtit [17]

Answer:

Factors (2 x 2 x 3 x 3 x 5 x 5 = 900). It can also be written in exponential form as 22 x 32 x 52.

Step-by-step explanation:

4 0
3 years ago
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