The unknown digit is 7 because 6.471 is greater than 6.470 and less than 6.48.
Answer:
the sum of four consecutive, odd whole numbers is 48
Step-by-step explanation:
Answer:

Step-by-step explanation:
Multiply the two polynomials by multiplying each term

The top 4 firms have (23 +22 +18 +12)% = 75% of the market.
The 4-firm concentration ratio is 0.75 or 75%.
For question 6 the answer is 100 because a quarter of a circle is 90 degrees