Who wrote how the other half lives, a book that described the terrible conditions of tenement life in the late 1800s? lincoln steffens charles darwin jane addams jacob riis

Jacob Riis was the one who wrote How the Other Half Lives.

Explanation:

Jacob August Riis was an American journalist and photographer. Riis was a pioneer in investigative journalism, documentary photography and photojournalism.

In 1890, Riis wrote the book How the Other Half Lives. It tells about the life of New York slums in the late 19th century. The work contained revealing pictures of Riis' deplorable conditions in the migrant poverty. Riis sought to highlight the shortcomings of their living conditions and to bring about improvements. The work attracted widespread attention and impressed, among others, future president Theodore Roosevelt. How the Other Half Lives accelerated new legislation aimed at curbing rental housing problems.

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34