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Igoryamba
3 years ago
12

And how many years would I have to buy all three items again the microscope is every five years safety goggles every test tube e

very two years.
Mathematics
1 answer:
Fynjy0 [20]3 years ago
6 0

Answer:

20 years

Step-by-step explanation:

20 is the lowest common multiple for 5,4,2

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MrRissso [65]

Answer:

the answer is A=8.96 X 10 with a power of 7

5 0
3 years ago
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According to the National Beer Wholesalers Association, U.S. consumers years and older consumed gallons of beer and cider per pe
12345 [234]

Complete question :

According to the National Beer Wholesalers Association, U.S. consumers 21 years and older consumed 26.9 gallons of beer and cider per person during 2017. A distributor in Milwaukee believes that beer and cider consumption are higher in that city. A sample of consumers 21 years and older in Milwaukee will be taken, and the sample mean 2017 beer and cider consumption will be used to test the following null and alternative hypotheses:

H, :μ< 26.9

Ha : μ> 26.9

a. Assume the sample data led to rejection of the null hypothesis. What would be your conclusion about consumption of beer and cider in Milwaukee?

b. What is the Type I error in this situation? What are the consequences of making this error?

c. What is the Type II error in this situation? What are the consequences of making this error?

Answer:

Kindly check explanation

Step-by-step explanation:

Given the null and alternative hypothesis :

H0 :μ< 26.9

Ha : μ> 26.9

Assume the Null hypothesis is rejected ;

We conclude that there is significant evidence that the mean consumption of beer and cider is higher in the city (more than 26.9 gallons).

B.) Type 1 error is committed when the Null hypothesis is incorrectly rejected.

C.) Type 2 error is committed when we fail to reject a false null hypothesis. In this scenario, we fail to conclude that the average consumption of beer and cider is more than 26.9 gallons per person.

5 0
2 years ago
Home sales again In the previous exercise, you found a 95% confidence interval to estimate the average loss in home value. a) Su
Sphinxa [80]

Answer:

Step-by-step explanation:

Given that Home sales has 95% confidence interval to estimate the average loss in home value.

a) If std deviation of losses doubles as 3000 from 1500, we have margin of error also increases.  Because margin of error

= ±Critical value * Std error

= ±Critical value * Std dev/sqrt n

Hence we find that whenever std deviation increases the margin of error increases, for the same level of confidence.

b) Whenever confidence level increases, critical value increases and as a result margin of error increases.  Hence by reducing from 95% to 90% confidence interval would be reduced. True

c) Instead of changing conf level, increasing sample size would give more reliale and accurate results.

7 0
3 years ago
A lawn is in the shape of a right angled triangle. the lengths of the 2 shorter sides are
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Answer:

x=5 ; Area= 84m²

Step-by-step explanation:

(x+2)²+(4x+2)²=(5x)²

x²+4+4x+16x²+16+32x=25x²

8x²-36x-20x=0

x=5;x=-1

hypotenuse should be positive

x=5

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6 0
2 years ago
What is the difference of 7x − (25x2 + 12x)
Sav [38]
If you would like to solve 7x - (25x^2 + 12x), you can do this using the following steps:

7x - (25x^2 + 12x<span>) = 7x - 25x^2 - 12x = - 25x^2 - 5x
</span>
The correct result would be <span>- 25x^2 - 5x.</span>
7 0
3 years ago
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