Answer:
vertex is (2,-5)
Step-by-step explanation:
y = a(x – h)^2 + k
the vertex is (h,k) in the equation h =2 and k = -5
3.6/12=0.3
each pen costs 0.3 cents
13x10^15
8+5 = 13
6+9 = 15
a.84
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