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Over [174]
3 years ago
12

One side of a regular pentagon measures 0.8 M what is the perimeter of the regular pentagon

Mathematics
1 answer:
sergejj [24]3 years ago
7 0

Answer:

4m

Step-by-step explanation:

0.8x5=4

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Two trains leave the station at the same time, one heading west and the other east. The westbound train travels at 95 miles per
Ludmilka [50]

Answer:

2.2 hr

Step-by-step explanation:

Let t = time

95t = distance of westbound train

105t = distance of eastbound train

95t + 105t = 440

200t = 440

t = 2.2 hr.

8 0
3 years ago
Can you guys help me with Unit 3 mixed review???¿
Gwar [14]
7. 335*0.2=67

8. 4.5/0.6=7.5

9. A

Hope this helps!
4 0
3 years ago
Suppose you are the manager of Speedy Oil Change which claims that it will change the oil in​ customers’ cars in less than 30 mi
Veronika [31]

Answer:

Explained below.

Step-by-step explanation:

(1)

The hypothesis can be defined as follows:

<em>H</em>₀: The Speedy Oil Change will change the oil in​ customers’ cars in more than 30 minutes on average, i.e. <em>μ</em> > 30.

<em>H</em>ₐ: The Speedy Oil Change will change the oil in​ customers’ cars in less than 30 minutes on average, i.e. <em>μ</em> ≤ 30.

(2)

Use Excel to compute the sample mean and standard deviation as follows:

\bar x=\text{AVERAGE(array)}=24.917\\\\s=\text{STDEV.S(array)}=8.683

Compute the test statistic as follows:

t=\frac{\bar x-\mu}{s/\sqrt{n}}=\frac{24.917-30}{8.683/\sqrt{36}}=-3.51

The degrees of freedom is:

df = n - 1

   = 36 - 1

   = 35

Compute the p-value as follows:

p-value=P(t_{35}

(3)

The <em>p</em>-value = 0.0006 is very small.

The null hypothesis will be rejected at any of the commonly used significance level.

(4)

There is sufficient evidence to support the claim that the Speedy Oil Change will change the oil in​ customers’ cars in less than 30 minutes on average.

3 0
3 years ago
-0.4a+3=7<br><img src="https://tex.z-dn.net/?f=%20-%200.4a%20%2B%203%20%3D%207" id="TexFormula1" title=" - 0.4a + 3 = 7" alt=" -
natali 33 [55]
Sorry if I'm wrong
a = 10
this what I did
7 - 3 = 4 ÷ 0.4 = 10
5 0
3 years ago
Find the surface of the figure.<br><br><br> A) 348 m2<br> B) 347 m2<br> C) 174 m2<br> D) 360 m2
Verizon [17]
Answer :c
I think sorry if it’s not correct
6 0
2 years ago
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