Here ya go, enjoy my answer and good luck!
It would be 734.16 because 638.40+15% = 734.16
Answer:
a
Step-by-step explanation:
There are a couple of different ways you could do this, but I'll show the simpler way. We will use the formula

along with the fact that the vertex has h and k coordinates of 1 and 4 respectively, and that a point on the graph is (3, 5). We could have used any point on the graph where there is a definite integer coordinate pair. We will fill in accordingly and solve for a.
and
5 = 4a + 4. If we subtract 4 from both sides we get that
. Now we will fill in the formula and expand as needed:
and
. If we distribute the 1/4 in and then add the constants the final equation for that graph will be

The greatest age Brooke could be is 7