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Activity

Earlier, you found the average speed of the Soviet Luna I probe. In contrast, Apollo 11 was the first manned mission to the moon. Apollo 11
made the trip from Earth to the moon in 4.549 10 minutes. In this activity, you will determine the average speed of Apollo 11. Using this
information, you will also estimate which space vehicle, Lunal or Apollo 11, reached the moon faster.
Part A
Apollo 11 completed the distance of 3.8 x 10 kilometers in 4.549 x 109 minutes. What was the average speed of Apollo 117 Represent
your answer in scientific notation

1 Answer

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Answer:

The distance between Earth and the moon is 3.8x10^5 kilometers. It took 4.549x10^3 for Apollo 11 to travel to the moon.

The formula for speed is speed = distance/time.

So, the speed of Apollo 11 was 3.8x10^5/4.549x10^3 kilometers/minute.

Break the expression into the product of two fractions, with one fraction for the first factor and the other fraction for the powers of 10.

3.8/4.549 x 10^5/10^3

Upon dividing, the value of the first fraction is 3.8/4.549 = 0.835.

Using the properties of exponents, the value of the second fraction is 10^5/10^3 = 10^5 x 10^3 = 10^3-5 = 10^2.

To represent a number in scientific notation, the value of the first factor should be between 1 and 10. In this case, the first factor is 0.835. By multiplying 0.835 by 10, the first factor becomes 8.35. To make the expression have the same value, adjust the exponent by reducing it by a factor of 10. So, the answer is 8.35x10^1.

Explanation:

The average speed of Apollo 11 was 8.35 x 10^1 kilometers/minute.

edmentum sample answer

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