Robert participates in cup stacking competitions. When he practices he uses cups that measure
7 cm tall. The function below represents a
sequence in terms of the number of rows in the
pyramid, n, and the height of the pyramid, f(n).
f(n) = 7 + 7(n-1)
What is the height of the pyramid when there are
5,6, & 7 rows of cups,(n)?
A. 49 cm, 56 cm, 63 cm
B. 35 cm, 42 cm, 49 cm
C. 7 cm, 14 cm, 21 cm
D. 5 cm, 6 cm, 7 cm