Answer:
a. 48
b. You need 6 packs of cups and 8 packs of plates
c. 72 is another one she would need 9 packs of cups and 12 packs of plates to get this one
Answer:

Step-by-step explanation:
Explicit formula is used to represent all the terms of the geometric sequence using a single formula.

Here, a is the first term.
r is the common ratio.
r = second term ÷ first term
4, 8,16,32,64,.....
a = 4
r = 8 ÷4 = 2



-1 i think that the answer is -1