John is working part-time in an office. He works 30 hours per week and earns $600 each week. He currently has $2,700 in a savings account. John needs to spend $3,780 on car repairs. He sets aside $492 a week for his usual expenses. If John uses his savings to help pay for the repairs, it will take at least weeks to pay for the repairs.
A) 24x+16y
B) 0.6x+0.4y
C) 0.4x+0.6y
D) 16x+24y

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?