It was -3C at 5 am because 7am-4am=3 and -4c=-3c=-1c so take of -1c to make it -3c.
15. You can literally write any number (except 0)
16. 1/2 = 2/4 and 2 2/3
17. 12 2/3
18. 1776 ft tall
20. A, D, and E
21. A, B, and C
I hope this helped ^^
The quotient of 75 divided by 4 is 18.75, or 18