A full garbage truck weighed 6 1/8 tons After dumpimg the trash the truck weighed 4 8/10 tons. What was the weight if the garbage?

Please help me with these questions. I am not understanding what I did wrong. Please kindly input the correct answer Thank you

4. Say that we are measuring the distance between two objects, and we only have our feet for a measuring device. Say that you have an 8-inch foot. When you measure the space, and you have 90 steps between the two objects. How many feet are between the two objects?

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(q.16 f.e) Please show full work and make it match these two answers, Full-time : 6; Part-time: 4 QUESTION: Monica gave each of the full time employees in her small business a year-end bonus of $500 while each part time employee received $250. She gave a total of $4000 in bonuses to her 10 employees. How many full time employees and how many part time employees did Monica have? Thank you.