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4 + 15 - 10, because that would make 9
↑ ↑ ↑ Hope this helps :D
Answer: the answer is C.
Step-by-step explanation:
Answer:
an = 80. 2^(n-5)
r = a6/a5 =160/80 = 2
an = a5. r^(n-5)
= 80. 2^(n-5)
Let Carlo's age = x
Equation: 6*x = 108
6x = 108
Solution:
x = 108/6
x = 18
Carlo's age = 18 years
