Answer:
The correct answer is <em><u>A) At least once a year</u></em>
Explanation:
The battery and charging systems are very robust. However, they play such an important part that it is better to maintain and upkeep for maximum performance.
Once a year is an ideal time to check the charging and battery. If you have the time and expertise, you can obviously do it twice a year.
If you only do it once a year, it is better to do in the Fall, before winter arrives, so you are prepared.
Using the normal distribution, it is found that there is a 0.963 = 96.3% probability that on a given day, his commute will be longer than 49 minutes.
<h3>Normal Probability Distribution</h3>
The z-score of a measure X of a normally distributed variable with mean
and standard deviation
is given by:
![Z = \frac{X - \mu}{\sigma}](https://tex.z-dn.net/?f=Z%20%3D%20%5Cfrac%7BX%20-%20%5Cmu%7D%7B%5Csigma%7D)
- The z-score measures how many standard deviations the measure is above or below the mean.
- Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.
In this problem, the mean and the standard deviation are given, respectively, by:
.
The probability that on a given day, his commute will be longer than 49 minutes is <u>one subtracted by the p-value of Z when X = 49</u>, hence:
![Z = \frac{X - \mu}{\sigma}](https://tex.z-dn.net/?f=Z%20%3D%20%5Cfrac%7BX%20-%20%5Cmu%7D%7B%5Csigma%7D)
![Z = \frac{49 - 57}{4.5}](https://tex.z-dn.net/?f=Z%20%3D%20%5Cfrac%7B49%20-%2057%7D%7B4.5%7D)
Z = -1.78
Z = -1.78 has a p-value of 0.0375.
1 - 0.0375 = 0.963.
0.963 = 96.3% probability that on a given day, his commute will be longer than 49 minutes.
More can be learned about the normal distribution at brainly.com/question/24663213
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Examples of fixed costs include equipment costs and salaries; while variable costs include costs of materials and transportation costs.
<h3>What is "cost"?</h3>
In a company, costs include all the money that has to be paid for the company to offer a product or service.
<h3>What is the difference between a variable cost and a fixed cost?</h3>
Variable costs can vary or change depending on the number of units produced; on the other hand, fixed costs are constant.
<h3>What are some fixed and variable costs?</h3>
Fixed costs:
- Equipment cost.
- Interests on a debt.
- Salaries.
Variable costs:
- Cost of materials such as metal or wood.
- Transportation and packaging costs.
Learn more about costs in: brainly.com/question/15135554
Answer:
Climate and River Flow, Erosion
, River Obstructions, Pollution.
Explanation:
Sediment movement contributes to deteriorating environmental factors by causing high turbidity which in turn limits sunlight penetration into the water column. This has a negative effect on the growth of algae and aquatic plants.
Sediments present in rivers with spawning organisms, disrupt the ecosystem because the gravel beds involved in spawning are covered with sediments. The habitat of the fish is therefore, destroyed through this movement process.
Sedimentation can also lead to increased flooding by blocking the effectiveness of the reroute that should occur with water into drainage channels. Flooding, disrupts processes such as water transportation, disrupts day to day living most notably in areas closest to these rivers. These sediments as well could disrupt irrigation by clogging hydraulic mechanisms set in place to provide irrigation.
Tool to convert letters to numbers and vice versa. The letter-to-number cipher consist in replacing each letter by its position in the alphabet