Humans shed about three million particles of skin every five hours. humans can shed about fifty thousand particles of skin every five minutes. the approximate number of particles of skin a human can shed in five hours can be written in the form a × 10b, where a is 3 and b the approximate number of particles of skin a human can shed in five minutes can be written in the form a × 10b, where a is 5 and b is humans shed approximately times more particles of skin in five hours than in five minutes.

for 5 hours: b is 6

for 5 minutes: b is 4

60 times more skin in 5 hours than 5 minutes

Step-by-step explanation:

I think it should be written as a x 10^b, so I'm going to answer it that way.  

3 x 10^6 = 5 times 10^6

   10^6 = 1,000,000, so we have 3 x 1,000,000 = 3,000, 000

5 x 10^4 = 5 times 10^4

   10^4 = 10,000, so we have 5 x 10,000 = 50, 000

For part 3, divide 3 million by 50 thousand to find the scalar multiple

   3,000,000/50,000 = 300/5 = 60

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.