Please help with algebra

b

Step-by-step explanation:

100

C

Step-by-step explanation:

when you multiply numbers with exponents then you add the exponents and multiply the first digit

if you want an example or prove it replace the variables with a number 2 for a and 3 for b

(10(2)^5*(3)^3) *  (5(2)^6*(3)^2)= 24883200

and c is equal to 24883200

you can try the same process for the rest to double check

something over 10 so ? /10

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