Answer: 25%
Explanation:
GIVEN THE FOLLOWING ;
mean tax refund(m) = $2800
Standard deviation(sd) = $450
Assuming a normal distribution;
Percentage of refunds greater than $3100.
Taking the value of X as $3100 and finding the standardized score(Z-score)
Z-score = (X - m) ÷ sd
Z-score = (3100 - 2800) ÷ 450
Z-score = 300 ÷ 450 = 0.67
Therefore,
P(X > 3100)=P(Z-score > 0.67)
Similarly written as;
1 - P(Z-score < 0.67):
Locating the intersection 0.6 on the y-axis and .07 on the x-axis of the Z-table. This is equal to 0.7486.
Therefore,
1 - P(Z-score < 0.67) = 1 - 0.7486 = 0.2514 (approximately 25%)
= 25%
Answer:
b. use lower-cost materials
Explanation:
In Accounting, costing is the measurement of the cost of production of goods and services by assessing the fixed costs and variable costs associated with each step of production.
Production costs can be categorized as;
1. Variable costs: these are costs that usually change with respect to changes in the level of production or output. Examples are direct labor, maintenance of equipment or machines, raw materials costs etc.
2. Fixed costs: these are the costs which are not directly related to the level of production or not affected by the quantity of output in an organization. Examples are rent, depreciation, administrative cost, research and development costs, marketing costs etc.
Some of the ways to accomplish activity cost reduction are;
I. The operations of a business firm should be improved in order to make the activity-base usage per unit to be reduced.
II. The classification of employees doing an activity should be changed so as to decrease the activity rate.
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Learn more about blueprint here: brainly.com/question/11555839
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