To determine how many hours it will take for the asteroid to hit Mars, we can use the formula:
\[ \text{time} = \frac{\text{distance}}{\text{speed}} \]
Given:
- Distance = \(3.311 \times 10^8\) miles
- Speed = \(7.7 \times 10^4\) miles per hour
Now, we can calculate the time:
\[ \text{time} = \frac{3.311 \times 10^8 \text{ miles}}{7.7 \times 10^4 \text{ miles per hour}} \]
To simplify the calculation, we'll divide the coefficients and subtract the exponents:
\[ \text{time} = \frac{3.311}{7.7} \times 10^{8 - 4} \]
Calculating the coefficient:
\[ \frac{3.311}{7.7} \approx 0.4301 \]
Now, subtracting the exponents:
\[ 10^{8 - 4} = 10^{4} \]
Putting it all together:
\[ \text{time} \approx 0.4301 \times 10^{4} \]
Now, we convert \(0.4301 \times 10^{4}\) into scientific notation:
\[ 0.4301 \times 10^{4} = 4.301 \times 10^{3} \]
So the time it will take before the asteroid hits Mars is approximately:
\[ \boxed{4.301 \times 10^{3}} \text{ hours} \]