Answer: -7cos(x)
Step-by-step explanation:
d/dx (f(x))= -7cos(x)
The image is really unclear but I will assume that the number of teams given = 66
and the formula is

plug in the number of teams

multiply both sides by two

subtract 132 from both sides and factor
t = 12
Answer:

Step-by-step explanation:
move the decimal so there is one non-zero digit to the left of the decimal point. the number of decimal places you move will be the exponent on the 10. if the decimal is being moved to the right, the exponent will be negative. if the decimal is being moved to the left, the exponent will be positive.
15.5-3.5=12. this is how many hours he has worked already.
12/1⅓=9. this is because how many hours he has worked per how many hours he worked per day to show how many days he worked
the answer is 9 days.
12hours * 1day/1⅓ hours
^^ignore that if it doesn't make sense, but basically the hours will cancel and you'd be left with days as your only unit to show why you would divide 12 by 1⅓
hope this helped!
Answer:
3.1
Step-by-step explanation: