Answer:
the first answer
Step-by-step explanation:
83 is between 82 and 85, and 83 is closer to 82 than it is to 85.
The rate at which the temperature is changing at 9 a.m. is 19.03 degrees Celsius per hour
<h3>How to determine the rate at 9a.m?</h3>
The function is given as:

9a.m is 9 hours since midnight.
This means that
x = 9
So, we have:

Evaluate

Evaluate the expression
t(h) = 19.03
Hence, the rate at which the temperature is changing at 9 a.m. is 19.03 degrees Celsius per hour
Read more about rates at:
brainly.com/question/25545513
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Answer:
60-32i
Step-by-step explanation:
(8-2i)^2=8^2-2.8.2i+(2i)^2
=64-32i+4i^2
=64-32i-4
=60-32i
A- 5.3 cm
B- 17.8m
C-9.7 in
D-12 cm
E- 8.3ft
F-25.5m
Negative numbers don’t have real square roots since a square is either positive or 0