The answer to your question is y=-7
<span>The mean of a set of data is 148.87 and its standard deviation is 68.29. Find the z score for a value of 490.19
the z-score is given by:
z=(x-</span>μ<span>)/</span>σ
plugging in the values in the expression we get:
z=(490.19-149.87)/68.29
z=340.32/68.29
z=4.9835
The first pipe pumps out

while the second pipe pumps out

So together, both pipes pump out

That is, with both pipes filling the tank, it should take 32 minutes total.
Answer:

Step-by-step explanation:
Apply exponent rule: 
