Mean = np = 60(0.7) = 42
Standard deviation = sqrt(npq) = sqrt(60(0.7)(0.3)) = 3.55
Answer:
y= mx + c (m- slope, c- y intercept)
or, y = x +3
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Yes, you can use the pythagorean theorem because when putting a diagonal in a rectangal, it creates 2 right triangles.