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4 years ago

Erica used friendly numbers to find 43-19. She added 1 to 19 and subtracted 1 from 43. What is Erica's error?

Mathematics

2 answers:

Naily [24]4 years ago

8 0

I think that it is....
42-20=22

Olenka [21]4 years ago

7 0

She could have added 1 to 19 to give 20 then subtracted this from 43 to give 23. Then she can add the 1 to 23 to get the correct answer which is 24.

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Davina has a large cellar for her wine bottles and also a small fridge dedicated to wine storage in her kitchen. Davina drinks o

nadya68 [22]

I believe that the answer is 10 because the first bottle will be exposed to the light 3 times and then the next will be exposed 4 times and then the next 5 and so on so by the tenth bottle it will have been exposed 12 times by the time she drinks it.
The answer is 10

4 0

3 years ago

Please help I am failing this class!

AleksAgata [21]

Step-by-step explanation:

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3 years ago

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A fertilizer company manufactures 10-pound bags of fertilizer with a standard deviation of 0.24 pounds per bag. The bag weights

Ksju [112]

Answer:

the probability that a sample of 4 bags will have a mean weight less than 9.8 pounds is 0.05

Step-by-step explanation:

Given the data in the question;

μ_x = 10 pound bags

standard deviation s_x = 0.24 pounds

sample size n = 4

The bag weights are normally distributed so;

p( x' less than 9.8 ) will be;

p( (x'-μ_x' / s_x') < (9.8-μ_x' / s_x') )

we know that;

μ_x' = μ_x = 10

and s_x' = s_x/√n = 0.24/√4

so; we substitute

p( z < ( (9.8 - 10) / (0.24/√4) )

p( z < -0.2 / 0.12 )

p( z < -1.67 )

{ From z-table }

⇒ p( z < -1.67 ) = 0.0475 ≈ 0.05

Therefore, the probability that a sample of 4 bags will have a mean weight less than 9.8 pounds is 0.05

3 0

3 years ago

Researchers randomly surveyed people at two amusement parks, Funland and Thrillville, to find out how many times they visit the

STALIN [3.7K]

On average, people visit Thrillville 2 more times per year than Funland.

<h3>Averages</h3>

To determine how many more times per year, on average, do people visit Thrillville than Funland, the following calculation must be performed:

Funland: 4,1,2,1,5,6,3,2,4,3,2,6,1,3,2 = 45
45 / 15 = 3
Thrillville: 8,6,5,7,2,5,4,2,1,9,3,8,3,7,5,2,9,4,2,8 = 100
100 / 20 = 5
5 - 3 = 2

Therefore, on average, people visit Thrillville 2 more times per year than Funland.

Learn more about averages in brainly.com/question/2426692

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3 years ago

A farmer will divide a 1/4 acre plot of land into three equal-sized sections what will be the size of each section?

Natalija [7]

1/4:3= 1/4•1/3=1/12acre - size of each section

1/2•1/5=1/10yard

8 0

3 years ago

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