Answer:
she can bake 216 cookies in 360 minutes
Step-by-step explanation:
Substituting, we have
... f(x+4) = (x+4)² + 8(x+4) +7
... = x² +8x +16 +8x +32 +7
... = x² + 16x + 55
Subtracting the original, we have
... f(x+4) - f(x) = (x² +16x +55) -(x² +8x +7)
... f(x+4) - f(x) = 8x +48
3,6,6,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,13,14
The mode is the number that appears most often in a data set, so the answer is 12.