10 units up means to add 10 to the y-coordinate of the vertex (h, k).
p(x) = 0.005(x - 40)² + 60
p(x) shifted up 10 units = 0.005(x - 40)² + (60 + 10)
q(x) = 0.005(x - 40)² + 70
For this case we must clear x from the given equation:

We passed 23 subtracting the other side of equality:

By definition,
is written as 
So, we have:

So, the solution of
for x is:

Answer:



The answer is x=1.3
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