struckedblazing
11.04.2020 •
Mathematics
A lawn sprinkler located at the corner of a yard is set to rotate through 50 and project water out 30.0 feet. To the nearest tenth of a foot, what area of lawn is watered by the sprinkler?
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Ответ:
1
Step-by-step explanation:
Equation of variance:
Total Variance = sum (i=1, N) {c^2,variance^2}
= c1^2*variance1^2 + c2^2*variance2^2 +
Variance of X = 1
Variance of Y = 5
Variance of Y - 2X = (1^2)*(5) - (2^2)**(1)
= 5 - 4 = 1