Which expression is equivalent to 8^-3 times 8^-9? a. 1/8^27
b. 8^-12
c. 8^27
d. 1/8^-12

B

Step-by-step explanation:

Multiplying numbers with exponents rule:

Explanation of rule: keep the base the same and add the exponents. Keep in mind this rule only works when the base of both numbers are the same.

Applying rule: 8^-3 x 8^-9

keep base as 8 and add the exponents

b is the answer

3x + 4y -25 =0 represents the amount of change sianna should recieve