machopr
04.06.2020 •
Mathematics
A baker bought 7,500 grams of flour for $19.20. How much did each kilogram of flour cost
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Ответ:
7,5 kg = 19,20.
Step-by-step explanation:
19,20/7,5
= 2,56 $
(2,56 * 7,5 =19,20)
Ответ:
129
Step-by-step explanation:
Considering the survey to be representative, you can simply multiply the share of students p preferring “Track & Field” with the whole school population at the same time to estimate the number of such students in the whole school.
First we need to find the relative share p of such answers in the study by dividing it by the sum of answers, assuming that the table is complete for that random sample:
p = 4/(8 + 5 + 4) = 4/17
Then for the whole school we get 550 p ≈ 129.4