They were able to find the orbit of a comet and predict the year of its return.
Answer:
a) 
b) Efficiency=76.77%
Explanation:
a)
In order to solve this problem, we can use the following formula:

the problem provides us with all the necessary information so we can directly use the formula:


b) In order to find the efficiency, we can use the following formula:

so we get:

Efficiency=76.77%
All of the above. They all right
Answer:
'Daniela had a 5-meter head start, and Leonard caught up to her at 25 meters.'
Explanation:
hope that helps :)