Answer:
Step-by-step explanation:
5^-7 * 5^12
Because the base is the same, add the exponents.
5^ (-7+12)= 5^5
Final answer: 5^5, or 3125
Answer:
Step-by-step explanation:
A proportion could be used.
With 2 parts of compost and 6 parts potting soil, you would end up with 8 total parts.
So it can be written as a ratio of compost to total mix, or 
The problem states 10 kg are needed in total, and the variable would be the amount of compost
As a ratio it would be
.
Use the ratios to write a proportion.

Multiply both sides of the equation by 10

Convert to a decimal if desired.

Answer:
I believe the answer is -176º