What is the sum of 100.0 g and 0.01 g, expressed in scientific notation and written with the correct number of significant figur
1 answer:
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Answer:
b) 1.34
Step-by-step explanation:
The z score is used to determine the number of standard deviations by which the raw score is above or below the mean. If the z score is positive then the z score is above the mean while for a negative z score implies that it is below the mean. The z score is given by:
For the largest 9%, the score is 100% - 9% = 91% = 0.91
From the normal distribution table, the z score that corresponds to 0.91 is 1.34
Answer:
Grasses: 12
Weeds: 29
Trees: 39
Step-by-step explanation:
Let G, W and T represent number of grasses, weeds, and trees that are major pollen sources.
We have been given that there are 80 major sources of pollen in state A. We can represent this information in an equation as:
We are told that the number of weeds is 7 less than thrice the number of grasses. We can represent this information in an equation as:
We are also told that the number of trees is 3 more than thrice the number of grasses. We can represent this information in an equation as:
Upon substituting equation (2) and equation (3) in equation (1), we will get:
Therefore, there are 12 grasses that are major pollen sources.
Number of weeds that are major pollen sources:
Therefore, there are 29 weeds that are major pollen sources.
Number of trees that are major pollen sources:
Therefore, there are 39 trees that are major pollen sources.