Can someone answer this question please please help me I really need it if it’s correct I will mark you brainliest .

4 * 10 ^-4

Step-by-step explanation:

2 * 10 ^- 6    * 2 * 10 ^2

Multiply the numbers

2*2 = 4

Add the exponents

10 ^ (-6+2) = 10 ^-4

4 * 10 ^-4

the answer is b.

step-by-step explanation:

identity property is where 0+whatever number=whatever number. basically 0+ a number.

i believe it's a.

i'm not sure on this one, most likely correct.