We are given:
Area (A) = 1,200,000 m^2
Population density (P) = 30 grasshoppers / m^2
To solve the total grasshoppers in the swarm, simply
multiply A and P, that is:
total = A * P
total = (1,200,000 m^2) * (30 grasshoppers /
m^2)
total = 36,000,000 grasshoppers
In standard form this is:
3.6 x 10^7 grasshoppers
