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The sweater cost more originally. It costs $2.50 more from jacket.
Step-by-step explanation:
Given,
Discount rate of sweater = 20%
Sale price of sweater = (100-20)% = 80%
Discount rate of jacket = 15%
Sale price of jacket = (100-15)% = 85%
Sale price of each item = $34.00
Let,
x be the original price of sweater.
y be the original price of jacket.
80% of x = 34
Dividing both sides by 0.80
The original price of sweater is $42.50
85% of y = 34
Dividing both sides by 0.85
The original cost of jacket is $40
Difference = 42.50 - 40 = $2.50
The sweater cost more originally. It costs $2.50 more from jacket.
Keywords: subtraction, division
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Answer:
Interval [16.34 , 21.43]
Step-by-step explanation:
First step. <u>Calculate the mean</u>
Second step. <u>Calculate the standard deviation</u>
As the number of data is less than 30, we must use the t-table to find the interval of confidence.
We have 6 observations, our level of confidence DF is then 6-1=5 and we want our area A to be 80% (0.08).
We must then choose t = 1.476 (see attachment)
Now, we use the formula that gives us the end points of the required interval
where n is the number of observations.
The extremes of the interval are then, rounded to the nearest hundreth, 16.34 and 21.43
