An asteroid is heading toward Mars at the rate of 7.7×104

miles per hour.

If the asteroid is 3.311×108
miles away from Mars, how many hours will it be before it hits Mars?


Remember, time equals distance divided by rate.

Write the answer in scientific notation, expressed to the exact decimal place.

(1 point)
The asteroid will hit Mars in
hours.

1 answer

To find out how many hours it will take for the asteroid to hit Mars, we can use the formula:

\[ \text{Time} = \frac{\text{Distance}}{\text{Rate}} \]

Given:

  • Distance = \(3.311 \times 10^8\) miles
  • Rate = \(7.7 \times 10^4\) miles per hour

Now, we can substitute the values into the formula:

\[ \text{Time} = \frac{3.311 \times 10^8 \text{ miles}}{7.7 \times 10^4 \text{ miles per hour}} \]

Calculating this gives:

\[ \text{Time} = \frac{3.311}{7.7} \times \frac{10^8}{10^4} \]

First, calculate \(\frac{3.311}{7.7}\):

\[ \frac{3.311}{7.7} \approx 0.430 \]

Next, calculate \(\frac{10^8}{10^4} = 10^{8-4} = 10^4\).

Combining these results:

\[ \text{Time} \approx 0.430 \times 10^4 = 4.30 \times 10^3 \]

So, the time before the asteroid hits Mars is:

\[ \text{Time} = 4.30 \times 10^3 \text{ hours} \]

Thus, the asteroid will hit Mars in \( \boxed{4.30 \times 10^3} \) hours.