Question

Assume that the grasshopper in the food pyramid above must eat half its body weight in grass each day. If an average-size grasshopper weighs 2 grams, and 1 blade of grass weighs 0.1grams (one tenth of a gram), how many blades of grass does the grasshopper need to eat each day?

Answer 1

The first thing we need to know is how much grass the grasshopper needs to eat.
 We have:
 "must eat half its body weight in grass each day":
 (2 grams) * (1/2) = 1 gram
 Then,
 "1 blade of grass weighs 0.1grams"
 Then the amount you need to eat is given by:
 N = (1) / (0.1)
 N = 10 blades of grass
 Answer:
 the grasshopper needs to eat 10 blades of grass each day