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4 years ago

What part of a aday is 4 hours and 20 mintes?

1 answer:

4 0

Let's convert everything to minutes and create a fraction.

A day has 24*60 = 1440 minutes
4 hours and 20 minutes is 4*60+20 = 260 minutes

The fraction 260/1440 simplifies to 13/72 part of a day.

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2.) [ 2 points] The graph to the right shows the distance in

Softa [21]

I need help with this to

8 0

4 years ago

Read 2 more answers

Perform the following divisions. be sure all answers are reduced to lowest terms. 7/12 ÷ 3/4 =

Free_Kalibri [48]

7/12 / 3/4

You can write it as

7/12 * 4/3

=28/36 = 14/18 = 7/9

So, 7/9 is your answer

7 0

3 years ago

Results of a survey conducted in 15 large cities within the U.S. finds that the average commute time one way to/from work is 25.

irina1246 [14]

Answer:

We conclude that commute time in her city is less than the amount reported by the survey which is 25.4 minutes.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 25.4 minutes

Sample mean, $\bar{x}$ = 22.1 minutes

Sample size, n = 15

Alpha, α = 0.10

Sample standard deviation, s = 5.3 minutes

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 25.4\text{ minutes}\\H_A: \mu < 25.4\text{ minutes}$

We use one-tailed t(left) test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{22.1 - 25.4}{\frac{5.3}{\sqrt{15}} } = -2.411$

Now, $t_{critical} \text{ at 0.10 level of significance, 14 degree of freedom } = -1.345$

Since,

$t_{stat} < t_{critical}$

We fail to accept the null hypothesis and reject it. We accept the alternate hypothesis.

Thus, there is enough evidence to conclude that commute time in her city is less than the amount reported by the survey which is 25.4 minutes.

7 0

4 years ago

Pleaseee helpppp????????

Zinaida [17]

Answer:

The first one of the second column

Step-by-step explanation:

Multiply -5 by each number inside the parenthesis remembering that when you multiply two negative numbers the result is positive

-5(4x-7)+8=3x

-20x+35+8 = 3x

4 0

4 years ago

Find NX. PLs help with this problem !

Harrizon [31]

Answer:

It i 5.Because it is Equlitrial triangle

8 0

3 years ago