To ensure that the mass of an average grain of rock salt stays the same, what should you multiply the first factor, 1.2, by so that 10^2 becomes 10^4?

50- 250 is correct i did that one too

step-by-step explanation:

step-by-step explanation: 4 cause 2+2=4

3,6 and 7.

step-by-step explanation:

a) unit place of 37 is 7

so the unit place of cube of 37 will be

7³= 343=3

the answer is 3.

b) unit place of 56 is 6, so the unit place of cube of 56 will be

6³= 216=6

the answer is 6.

c) unit place of 133 is 3, so the unit place of cube of 133 will be

3³= 27= 7.

the answer is 7.