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in a race derek is 10 yards ahead of mike, mike is 5 yards ahead of tom, and ed is 20 yards ahead of derek. list the runners in order from 1st to 4th.
a. ed, derek, mike, tom
b. derek, tom, mike, ed
c. tom, ed, derek, mike
d. mike, tom, ed, derek

The answer is letter A, Ed, Derek, Mike, Tom

Explanation:

The question is asking for the order from the 1st to the 4th (first to last). All you have to do is to follow the instruction or draw an illustration (if you can).

If Derek is 10 yards ahead of Mike, this means that Derek's position is ahead of Mike.

If Mike is 5 yards ahead of Tom, then this means that Mike's position is ahead of Tom.

If Ed is 20 yards ahead of Derek, then this means that Ed's position is ahead of Derek.

If Derek is ahead of Mike, Mike being ahead of Tom and Ed being ahead of Derek, then you'll be able to tell the positions now.

This means that the 1st runner is Ed, while the second runner is Derek. The third runner is Mike, while the fourth runner is Tom.

Thus, this explains the answer.

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.