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Leni [432]
3 years ago
11

A company claims that 80% of its customers are under 30. You suspect it is less than this. You take a random sample of 200 custo

mers to test this and find out that 75% of your sample are under 30. What is the alternative hypothesis here
Mathematics
1 answer:
son4ous [18]3 years ago
8 0

Step-by-step explanation:

What we are trying to show is the alternative hypothesis. Here, we are trying to show that what the company claims is wrong; less than 80% of the company's customers are under 30.

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Write a decimal to show how much of the grids are shaded.<br><br><br><br>plz help me​
NikAS [45]

Answer:

1a. 1.5

1b. 0.38

Step-by-step explanation:

a.

one full grid is full (1) and half a grid is full (0.5)

b.

there are 100 squares and 38 of them are filled in,so you divide 38 by 100 which is 0.38

4 0
2 years ago
How much energy in joules can the solar panel produce each day if solar cells were 100% efficient and generate 1000 watts of pow
notsponge [240]

Answer:

The solar panel produce 6.48 × 10⁶ J of energy each day.

Step-by-step explanation:

If the solar cells were 100% efficient and generate 1000 watts of power per square meter

The power generated per square meter will be

\frac{100}{100} \times 1000 watts/m^{2}

= 1000 watts/m²

This is the power that would be generated per square meter if the solar cells were 100% efficient.

Now, for a 1 square meter panel of solar cells with an efficiency of 30%, the power generated will be

\frac{30}{100} \times 1000 watts/m^{2} \times 1m^{2}

= 300 watts

This is the power that would be generated by a 1 square meter panel of solar cells with an efficiency of 30%

Now, to determine the energy in joules (J) that the solar panel produce each day

We can determine the energy from the formula

Energy = Power × time

From the question, the solar cells receives the equivalent of 6 hours of direct sunlight per day, that is

Time = (6 × 60 × 60) secs = 21600 secs

Hence,

Energy = 300 watts × 21600 secs

Energy = 6480000 Joules

Energy = 6.48 × 10⁶ J

8 0
3 years ago
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Step-by-step explanation:

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