Answer:
30 sec.
Step-by-step explanation:
Multiply 10(amount total)*3( one cm)
C. because 2.25 X 3 = 6.75 and 6.75 X 3 is 20.25
Answer:
Step-by-step explanation:
Events that are impossible are defined to have a probability of 0. No chance! :)
The answer is 
First you must change the fractions so that they have like denominators.
Then you subtract the fractions.

Finally, you need to simplify the answer.
