What is the value of 9^-6/9^-4?

9^-2 or 1/81

Step-by-step explanation:

Exponent Rule:

When dividing exponents, they're subtracted.

Since the second term has a negative exponent, we add.

Change the problem into multiplication, then add 4 to the exponent of -6:

C 10% Condition.

Step-by-step explanation:

Let's Look at them one by one.

A: Large Enough sample condition.

this is met because 600 students is a good number to carry out a surwey.

B: Randomization,  600 incoming freshman are definitely random.

C: we are left with C so the answer is C.