Help me please and thank you

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs

Which expression gives the exact value of x?

Ana’s dachshund weighed 5 5/8 pounds when it was born . by age 4 the dog weighed 6 times as much. fill each box with a number or symbols from the list to show how to find the weight of ana’s dog at age 4 . not all numbers and symbols my be used