Answer:
a) 
b) 
Step-by-step explanation:
Use logarithm properties:

Then
a) 
b) 
Answer:D
Step-by-step explanation:
This is D because your dividing by 5 or each one and thats how you get Your output number
Answer:
$15
Step-by-step explanation:
if one pound is $5 and we need 3, then we can multiply the price of one pound by 3. (3×$5) This gives $15
The answer is -4 and 21
I am glad to help!