Answer:
Step-by-step explanation:
3 min 20 seconds = 3*60 + 20 = 180 +20 = 200 seconds
2 min 44 seconds = 2*60 + 44 = 120 + 44 = 164 seconds
Improvement = 200 - 164 = 36 seconds
Percentage =(36/200) *100
= 18 %
5:4 You just put a Colen In the middle EDIT*THERE WOULD ACTUALLY BE A INFINITE AMOUNT OF ANSWER FOR EXAMPLE IT COULD BE 10:8 BECAUSE YOU MULTIPLY BY 2 SO EVERY TIME U DO DAT U HAVE MANY ANSWERS.
Yes Porque to see what happens