Tony wants to buy a new collar for each of his 4 dogs. the collars come in a choice of 9 different colors. step 2 of 2 : how many selections of collars are possible if repetitions of colors are not allowed?

3024

Step-by-step explanation:

Given: Tony wants to buy a new collar for each of his 4 dogs.

           The collars come in a choice of 9 different colors.

To find : How many selections of collars are possible if repetitions of colors are not allowed?

Solution:

First we select collar from 9 collars . So, after selecting one collar, we will select next one collar from the remaining 8 collars and so on..

So, we will use the formula :

So no. of selections  of collars for 4 dogs are possible if repetitions of colors are not allowed

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Hence , 3024 no. of slections are possible if repetitions are not allowed.

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.