M is directly proportional to r³ when r=4, m=160.work out the value of r when m=20

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.

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

Typically a point in a three dimensional cartesian coordinate system is represented by which of the following answers in the picture !