Keep the bases of 6 and add exponents: 
Keep the bases of 11 and add exponents: 
So its C.
hope that helps :)
Answer: So, 12 : 30 and 2 : 5 are the two equivalent-ratios of 6 : 15.
Step-by-step explanation:
Okay let’s go!
The original price is $847.98 with a sales tax rate of 7.75.
This means that the sales tax price is $65.72.
The final cost with sales tax price would be $913.70!
Have a good day :)