Someone helpful plz answer this question and use the table

Design a number line containing five (5) points2.benin, one of the smallest countries in africa, has a total area of 43,475 square miles. the population of the country was recently estimated at 10,160,555. about 3,657,790 people live in rural areas. the country has only about 870 miles of surfaced roads. a. round off the total population to the nearest hundred thousand people. b. round off benin’s area in square miles to the nearest thousand. c. round off the number of miles of surfaced roads to the nearest ten. d. round off the number of people who live in rural areas to the nearest million.

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression