What times 5/8 equals 1

Which of those sequences is a geometric sequence

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

The ratio of men to women working for a company is 4 to 5 . if there are 90 women working for the company, what is the total number of employees?