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Answer:

Step-by-step explanation:
Given function:

As per question statement:
Initial temperature of bottle is 70
.
i.e. when time = 0 minutes, f(t) = 70 

After t = 3, f(t) = 42

Hence, the value is:

Answer: divide 2 from what you got from the last one
Step-by-step explanation:
32+16=48 so then divide 16 by 2 or subtract 8
Answer:
-40
Step-by-step explanation:
Answer:
Step-by-step explanation:
x + 40 = 10
x = -30
She paid $30 on her credit card