Answer:

Step-by-step explanation:
→ Substitute in t = -3 into 

→ Simplify

→ Simplify
⇔ 
Answer:
The answer should be B: 33.0
Step-by-step explanation:
I just used a calculator.
Answer:
3 years 8 month
Step-by-step explanation:
Given 7 years 6 months - 3 years 10 months
Step 1: Firstly we should subtract months from months then after from year to year.
Step 2: 6 months is less than 10 months so we have to borrow 1 year and add it to the months.
Step 3: Adding 1 year to 6 months we get 18 months.
Step 4: Now we have to subtract 3 years 10 months from 6 years 18 months.

Step 5: After subtracting we get 3 years 8 months.
Thus the answer is 3 years 8 months.
The answer should be 65. The number be added is doubled. +4,+8, +16, +32 So 32+33=65 65+64=129