During a sale, every item in a store is 80% of its regular price
2 answers:
Answer/Step-by-step explanation:
During a sale, every item in a store is<u><em> 80% of its regular price</em></u>
[1] if a regular T-shirt is $10, what is its sale price?
80% x 10 = 8
10 - 8 = 2.
Hence if a regular T-shirt is $10, the sale price will be $2.
[2] The regular prices of five items are shown here. Find the sale price of each item.
Item 1: 1x80%=0.8 1-0.8=0.2
Item 2: 4x80%=4-3.20=.60
Item 3: 10x80%=10-8=2
Item 4: 55x80%=55-44=11
Item 5: 120x80%=120-96=24
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Answer:
a. Mean = 155.1 grams
b. Standard deviation = 0.37
c. Fractional uncertainty = 0.074
Step-by-step explanation:
a. Average weight
This is same as the mean weight;
Mathematically, that would be; sum of the weights/ the number of weights
= (155.1 + 154.8 + 155.5 + 155.3 + 154.6)/5 = 775.3/5 = 155.06 which is approximately 155.1
b. Standard deviation
Mathematically; we calculate that using the formula;
√{(x-mean)^2/(N-1)}
Please check attachment for for the complete breakdown of this
c. Fractional uncertainty
= Standard deviation/number of measurements = 0.37/5 = 0.074
