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Mathematics, 21.06.2019 21:40
Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.
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Mathematics, 21.06.2019 22:30
Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by รขโ4 to get รขโ16x รขโ 4y = รขโ80 multiply the second equation by รขโ1 to get รขโ4x รขโ y = รขโ20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by รขโ1 to get รขโ2x รขโ 4y = รขโ14
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Mathematics, 22.06.2019 03:30
The distance between a football fsaid and a parking lot is 135 feet. what is that length in yards? 2 mickey needs to cut pieces of ribbon that are each 1 meter long to tie onto balloons. if he has 8 pieces of ribbon that are each 1 dekameter long, how many 1-meter pieces of ribbon can he cut? show work
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