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eimsori [14]
3 years ago
7

The free fall acceleration of an object under the influence of earths gravity 9.81. What is it’s value in I’m/min^2

Mathematics
1 answer:
ladessa [460]3 years ago
4 0

Answer:It means that the speed of a free falling object (an object only under the influence of gravitational force) increase at the rate of 9.8m/sec per second.

So the object will be traveling at 9.8m/sec just after 1st second is passed.

It would be traveling at 9.8m/s +9.8m/s =19.6m/s just after 2nd second.

It would be traveling at 19.6m/s + 9.8/s=29.4 m/s just after 3rd second,and so on .

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The following table gives results from two groups of students who took a nonproctored test. Use a 0.01 significance level to tes
Nana76 [90]

Answer:

Original claim is \mu_{1} =\mu_{2}

Opposite claim is \mu_{1} \neq \mu_{2}

Null and alternative hypotheses:

H_{0}:\mu_{1} = \mu_{2}

H_{1} : \mu_{1} \neq \mu_{2}

Significance level: 0.01

Test statistic:

We can use TI-84 calculator to find the test statistic and P-value. The steps are as follows:

Press STAT and the scroll right to TESTS

Scroll down to 2-SampTTest... and scroll to stats.

Enter below information.

\bar{x_{1}}=70.29

Sx1=22.09

n_{1} = 30

\bar{x_{2}}=74.26

Sx2=18.15

n_{2} = 32

\mu_{1} \neq \mu_{2}

Pooled: Yes

Calculate.

The output is in the attachment.

Therefore, the test statistic is:

t=-0.78

P-value: 0.4412

Reject or fail to reject: Fail to reject

Final Conclusion: Since the p-value is greater than the significance level, we, therefore, fail to reject the null hypothesis and conclude that the there is sufficient evidence to support the claim that the samples are from populations with the same mean.

6 0
3 years ago
A study shows that 20% of college students pray daily in their own religious beliefs. In a group of 300 college students, find t
svetlana [45]

Answer:

0.2805

Step-by-step explanation:

Given that p = 20% = 0.2, n = 300.

The mean (μ) = np = 0.2 * 300 = 60

The standard deviation (σ) = \sqrt{np(1-p)}=\sqrt{300*0.2(1-0.2)}=6.93

The z score is used to determine by how many standard deviations the raw score is above or below the mean. The z score is given by:

z=\frac{x-\mu}{\sigma }

For x = 57:

z=\frac{57-60}{6.93 } =-0.43

For x = 62:

z=\frac{62-60}{6.93 } =0.29

From the normal distribution table, P(57 < x < 62) = P(-0.43 < z < 0.29) = P(z < 0.29) - P(z < -0.43) = 0.6141 - 0.3336 = 0.2805

5 0
3 years ago
At a deli counter, someone bought 1.6 pounds of ham
Naddik [55]

Answer:

whats the question exatly?

Step-by-step explanation:

6 0
3 years ago
Represent 0.533 (only the last 3 is bar number) into a rational number
weqwewe [10]

Answer:

\frac{8}{15}

Step-by-step explanation:

We require 2 equations with the repeating 3 placed after the decimal point.

let x = 0.5333.. ( multiply both sides by 10 and 100 )

10x = 5.333... → (1)

100x = 53.333... → (2)

Subtract (1) from (2) tus eliminating the repeating 3

90x = 48 ( divide both sides by 90 )

x = \frac{48}{90} = \frac{8}{15}

3 0
3 years ago
Name an angle that is supplementary to ABC
olga nikolaevna [1]
I think the answer is Right angle
3 0
3 years ago
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