Which of the following expressions shows the number of 8 character passwords that can be formed using letters and digits if the password must begin with a letter? a.
21 times 36 superscript 7
b.
26 times 36 superscript 7
c.
26 superscript 5 baseline times 10 superscript 3
d.
36 superscript 8

Please select the best answer from the choices provided

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

m

step-by-step explanation:

2425

step-by-step explanation: