Answer:
480,700 sets (first choice)
Step-by-step explanation:
If all 25 questions are different,
When order of selection counts:
P(25,7)
= 25!/(25-7)!
= 15511210043330985984000000/6402373705728000
= 2422728000
When order of selection does not count count:
C(25,7)
=25!/(7!*(25-7)!)
=15511210043330985984000000/(6402373705728000*5040)
= 480,700
Hope this helps, have a nice day.
Answer:
Step-by-step explanation:
Vertex is halfway between focus and directrix, so focus is (-3,0).
Round to one decimal place
so you round the .8
look at the hundredth place and you see 6 so round up
38.9
Answer:
A
Step-by-step explanation:
