Answer:
<em>-4 4/5 deg F</em>
Step-by-step explanation:
3 pm: 5 1/5 deg
2 1/2 deg per hour for 4 hours = 2 1/2 deg * 4 = 10 deg
7 pm: 5 1/5 deg - 10 deg = -4 4/5 deg
<u>Inverse</u>
Square root of 64y16
8y4
Your answer is 6
I think the star just means a variable.