A^4 / a = a^3
b^-3 / b^-2 = b^(-3-(-2)) = b^-1 = 1/b
so the answer is a^3/b
5 x (6-3) + 10/ (8-3)
5 x (3) + 10/ (5)
15+2
17
What is the z-score of a newborn who weighs 4000 g?
For this question the answer is
-1
The formula for the confidence interval is given by
Sample mean + z*[σ/√n], and
Sample mean - z*[σ/√n]
We have:
Sample mean = 23.95
n = 40
σ = 2.55
z* for 99% confidence = 2.58
Substitute these values into the formula, we have
23.95 + (2.58)(2.55÷√40) = 24.99
23.95 - (2.58)(2.55÷√40) = 22.91
So the lower interval is 22.91 and the highest interval is 24.99
