80 cuz if u look after 7 it's 6 if it's 5 or bigger than 5 u round it u if it's not u put 0 i hope this helps=)
Answer:

Step-by-step explanation:

Answer:
Jason would be 18 years old
Step-by-step explanation:
sister = 6
mother = 39
mother is 15 year older than the sum of the kids ages
39-15= 24
24-6= 18
Jason is 18 years old
Answer: Choice A) 32
-----------------------------------------------
-----------------------------------------------
Plug n = 4 into the formula
tn = 4(2)^(n-1)
t4 = 4(2)^(4-1) ... every n is replaced with 4
t4 = 4(2)^3
t4 = 4(8)
t4 = 32