MEGA Elementary Education Multi-Content Practice Test

How long would it take a rocket traveling at 4.8 x 10^3 km per hour to reach Saturn from Earth, which is approximately 1.44 x 10^9 km away?

1. 3 x 10^3 hours

2. 3 x 10^5 hours

3. 6.9 x 10^12 hours

4. 6.9 x 10^27 hours

The correct answer is: 3 x 10^5 hours

To determine how long it would take for a rocket traveling at 4.8 x 10^3 km per hour to reach Saturn, which is 1.44 x 10^9 km away, you can use the formula for time, which is: Time = Distance / Speed. In this case, you substitute the values: Distance = 1.44 x 10^9 km Speed = 4.8 x 10^3 km/h Now, perform the division: Time = (1.44 x 10^9 km) / (4.8 x 10^3 km/h). To simplify this, you can separate the coefficients and the powers of ten: Time = (1.44 / 4.8) x (10^9 / 10^3). Calculating the coefficients gives: 1.44 / 4.8 = 0.3. For the powers of ten, when you divide, you subtract the exponents: 10^9 / 10^3 = 10^(9-3) = 10^6. Combining these results gives: Time = 0.3 x 10^6 hours = 3 x 10^5 hours