this makes no sense please help??

Question

anonymous · Answer

The expression 7! is equal to which of the following?
       a)7

       b)720

       c)5040

       b)40,320

amistre64 · Answer

what part of it doesnt make sense?

anonymous · Answer

i don't understand gow to find the answer

amistre64 · Answer

its just multiplying all the numbers 7 and below

anonymous · Answer

oh ok thanks how about this one
What is the value of 10P10?
a )3,628,800

 b) 1,814,400

  c)   100

  d)     0

amistre64 · Answer

10P10 = 10!

so just multiply all the numbers 10 and below

anonymous · Answer

so all your doing is 10*9*8*7*6*5*4*3*2*1= 3,628,800

amistre64 · Answer

correct

anonymous · Answer

ok thank you so much

amistre64 · Answer

note that:  10P4  is telling use to do the same thing, but with the first 4 numbers there

10*9*8*7

think of nPr as, "Picking" the first r numbers from n

anonymous · Answer

so if its 8P4 it would be 8*7*6*5

amistre64 · Answer

exactly

anonymous · Answer

ok thank you! you've helped so much!

amistre64 · Answer

;)  good luck

anonymous · Answer

:) thanks