2/3 of a hippo's life is spent under water, the rest of their life out of water is separated into grazing, sleeping, and socialising in the ratio of 4 : 7 : 1. the average life of a hippo is 45 years, how long will it spend doing each of these activities?

c

step-by-step explanation:

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870