Final answer:
To find the total number of blades of grass on the entire land, multiply the number of acres by the number of blades of grass per acre. The entire land has 5^19 blades of grass.
Step-by-step explanation:
To find the total number of blades of grass on the entire land, we need to multiply the number of acres by the number of blades of grass per acre. The area of land is 5^15 acres and each acre has 5^4 blades of grass. We can multiply the exponents to find the total number of blades of grass:
5^15 * 5^4 = 5^(15+4) = 5^19
Therefore, the entire land has 5^19 blades of grass.