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KiRa [710]
3 years ago
13

The family has crops growing on 15 acres of their farmland. At the beginning of the growing season, Jayleen and Wyatt ride a tra

ctor to prepare the soil and plant the seeds. IF it takes them 1.5 hours to plant one acre, how many hours will it take them to plant all 15?
Mathematics
1 answer:
belka [17]3 years ago
3 0

Answer:

10

Step-by-step explanation:

Given:it takes them 1.5 hours to plant one acre.

So, in order to plant all 15 acres it would take

15/1.5 = 10 hours

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The mean percentange of a population of people eating out at least once a week is 57℅
Sidana [21]

Answer:

<u>The correct answer is B. between 56.45% and 57.55% </u>

Complete statement and question:

The mean percentage of a population of people eating out at least once a week is 57% with a standard deviation of 3.50%. Assume that a sample size of 40 people was surveyed from the population a significant number of times. In which interval will 68% of the sample means occur?

between 55.89% and 58.11%

between 56.45% and 57.55%

between 56.54% and 57.46%

between 56.07% and 57.93%

Source: brainly.com/question/1068489

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Mean percentage of a population of people eating out at least once a week  = 57%

Standard deviation = 3.5%

Sample size = 40

Confidence level = 68%

2. In which interval will 68% of the sample means occur?

For answering this question, we should find out the standard deviation of the sample, using this formula:

Standard deviation of the sample = Standard deviation of the population/√Sample size

Standard deviation of the sample = 3.5/√40

Standard deviation of the sample = 3.5/6.32

Standard deviation of the sample = 0.55

Let's recall that a confidence level of 68% means that 68% of the sample data would have a value between the mean - 1 time the standard deviation of the sample and the mean  + 1 time the standard deviation of the sample. Thus:

57 - 1 * 0.55 = 57 - 0.55 = 56.45

57 + 1  * 0.55 = 57 + 0.55 = 57.55

<u>The correct answer is B. between 56.45% and 57.55% </u>

7 0
3 years ago
ILL BRAINLIEST YOU PLEASE HELP ME
svetoff [14.1K]
5 hope that helps you
8 0
3 years ago
Find x. 895852 = -70x + 789/9(3^3 × 6) - 30
snow_lady [41]

Answer:

x=  88168/7

Hope it helps!

 

7 0
2 years ago
What cuts a line segment in half
taurus [48]
Line segment bisector.

7 0
3 years ago
Read 2 more answers
What is the solution to this system of equations?
damaskus [11]

Since this is multiple choice ...

• check if B is correct:

x = 0, y = 4, z = 1   ⇒   3x - y + 4z = -4 + 4 = 0 ≠ -10

(it's not)

• check if C is correct:

x = -2, y = 4, z = 0

⇒   3x - y + 4z = -6 - 4 + 0 = -10

⇒   3x - y + 4z = 2 + 4 + 0 = 6

⇒   3x - y + 4z = -4 - 4 + 0 = -8

While this solution does satisfy the system, it can still have infinitely many other solutions that would work.

• check if D is correct:

Eliminate one of the variables from each equation. For instance,

(3x - y + 4z) + (-x + y + 2z) = -10 + 6

2x + 6z = -4

x + 3z = -2

and

(2x - y + z) + (-x + y + 2z) = -8 + 6

x + 3z = -2

but now it's impossible to eliminate one of the variables.

Therefore there are infinitely many solutions to the system [D].

3 0
1 year ago
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