Answer:
The correct choice is

Step-by-step explanation:
The given equation is

We rewrite the left hand side of the equation as a power(a number to a given exponent.

Recall that;

We apply this property to obtain;

Since the exponents are the same, the bases are also the same.
Therefore 
The teacher probably wants you to multiply cause area refers to that
Answer:
The number of observations is 15.
Answer: a
Step-by-step explanation: C is in quadrant 1 and quadrant 1 is (+,+)