Answer:I think a is:78.3 since it would be the same and since 0 doesn't have a value.
I think b is: 139.5 because all you are doing is subtracting 287.1-147.6
For e2020 the answer is C
Answer:
I think the right answer is B.
Answer:

Step-by-step explanation:
Changing Bases to Evaluate Logarithms

Apply change of base formula'

log term should be the numerator and denominator is the log base


64 is 4^3 and 16 is 4^2

Move the exponent before log

top and bottom has same log so cancel it out
