Plz someone help me ASAP

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18