Step-by-step explanation:
F-27=19
F= 19+27
F=46
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Answer:
the answer is C
used graphing calculator
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Average speed for Jaden’s train
= 130 km / (75/60) hours
= 130 km / 1.25 hours
= 104 km/h
Dani’s train travels from 15:15 to 18:30, which is 3 hours and 15 mins.
3 hours and 15 mins = 3.25 hours
Average speed of Dani’s train
= 312 km / 3.25 hours
= 96 km/h
Difference
= 104 - 96
= 8 km/h
The correct answer is B. Stratified sampling is used since the field is divided into subplots and a random sample is taken from each subplot.
Explanation:
Sampling refers to the process followed by researchers to select a group of individuals from a larger group; considering in most studies it is not possible to analyze all the population. In the case of stratified sampling, this involves dividing the general population into smaller groups, which are known as strata; after this, the researcher selects a specific number of individuals from each strata. This method guarantees the sample is selected randomly, and therefore the study is not biased. Stratified sampling was the method used in the example described because, in this, the general population (46-acre field) was divided into subplots that represent the strata. Also, after this, the researcher selected one random sample.
Step-by-step explanation:
C = wtc/1000
to solve for C, we have to make C the subject.
1000(C)= wtc
1000c =wtc
divide both sides of the equation by wt
1000c/wt= c this problem is not correct, check it again and let me know
