0.71 x 22 is the expression that works, because 1 AUD = 0.71USD.
Answer:

Step-by-step explanation:
Use formula

to convert Celsius to Fahrenheit.
When
then

When
then

Difference:

Anything between the decimal and last non-zero digit
so 00025 are significant
the 0 in front is insignificant because it could be
00000.00025
zeroes after the 25 don't matter becasue it could be
0.000250000000 and it wouldn't change
the sig figs are 00025
For number 2 it's would be 12.8
Sorry I don't have time for number 3
Answer:
c
Step-by-step explanation:
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