A fan of country music plans to make a custom CD with 14 of her 25 favorite songs. How many different combinations of 14 songs are possible? Is it practical to make a different CD for each possible combination?

4457400

Step-by-step explanation:

25C14 = 4457400

Not practical, these are too many

4,457,400  combinations.

Step-by-step explanation:

The number of combinations of 14 from 25 is a very large number :

25C14 =   25! / 14! 11!

=  4,457,400.

With so many possible combinations it would not be practical to make a Cd for all these possibilities.

step-by-step explanation:

107 units

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m