A mattress store sold 1,330 mattresses in one year. If 30% of the mattresses sold were king size mattresses, how many king size
2 answers:
Answer: 399
Step-by-step explanation:
Given: A store sold 1,330 mattresses within a single year.
With 30% of the mattresses being king size, we calculate the number of king size mattresses as follows:
30% of 1330
Use '×' instead of 'of' and convert the percentage to decimal by dividing by 100, resulting in:
Thus, the total of king size mattresses sold = 399
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Answer:
Upper limit: 3.116
Lower limit: 3.125
Step-by-step breakdown:
The random circle drawn by Hellen has a circumference of C=405 mm, measured to 3 significant figures, leading to a diameter, d, of 130 mm, accurate to 2 significant figures.
We utilize the formula
Substituting in the figures provides:
Consequently, Hellen’s value for π is recorded as 3.115 to three decimal places.
To find both limits, we divide the specified level of precision by two.
This figure is then added to the rounded number to determine the upper limit:
3.115+0.0005=3.1155
The lower limit calculates as 3.115-0.0005=3.1145
Answer:
d) Both blocks experienced equivalent energy loss due to frictionExplanation:
As stated in the question, two tractors are pulling two identical stone blocks the same distance across similar surfacesAdditionally, block A moves at double the speed of block B when completing the race
This implies both blocks suffer from comparable friction loss
Moreover, we understand that
Energy loss from friction is
Thus, the friction loss should be identical for both blocks
therefore, option d is the accurate choice
Response:
Sampling with replacement signifies that a marble is selected, its color is noted, replaced, and the box is shaken before another selection is made.