**Answer: The man has 10$.**

**Step-by-step explanation:**

We start with the number 60. He sells the goat for 70 dollars, and makes a 10 dollar profit. Then, he buys it for 80$, leaving him with 0. But then he sells it for 90$, making another profit of 10$.

**Answer:**

The earning rate is approximately 0.08.

**Step-by-step explanation:**

We can determine the yearly rate by means of compound interest, which is defined by:

**(Eq. 1)**

Where:

- Initial deposit, measured in US dollars.

- Earning rate, dimensionless.

- Earning periods, measured in years.

We proceed to clear the earning rate within:

If we know that and , then the earning rate is:

The earning rate is approximately 0.08.

Answer:

Step-by-step explanation:

It means if she planted 12 tulips then 4 daffodils for every 3 tulips = 16 daffodils

Total = 12 + 16 = 28