-12+8yi=3x-i solve for x and y
1 answer:
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Answer:
- 272.6
Step-by-step explanation:
This is an isosceles triangle with base of 21 and sides of 28.
<u>Area formula</u>
- A = 1/2bh
<u>Find height:</u>
- h =
<u>Area:</u>
- A = 1/2(25.96)(21) = 272.6 (rounded)
Using the normal distribution, it is found that 0.2119 = 21.19% of rainy days have rainfall with pH below 5.0.
<h3>Normal Probability Distribution</h3>The z-score of a measure X of a normally distributed variable with mean and standard deviation
is given by:
- The z-score measures how many standard deviations the measure is above or below the mean.
- Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.
The mean and the standard deviation are given, respectively, by:
The proportion of rainy days have rainfall with pH below 5.0 is the <u>p-value of Z when X = 5</u>, hence:
Z = -0.8
Z = -0.8 has a p-value of 0.2119.
0.2119 = 21.19% of rainy days have rainfall with pH below 5.0.
More can be learned about the normal distribution at brainly.com/question/25800303
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