Answer:
c.7,999,999
Step-by-step explanation:
The phone number is of the form ABC - XXXX
A can be any number from 2 - 9. This means number of possible values for A are 8.
The rest of the places B,C and X can be any digit from 0 - 9. This means there are 10 possible values for each of these.
Since, value to A can be assigned in 8 ways, and to the rest of the 6 positions in 10 ways, according to the fundamental rule of counting, the total number of possible phone numbers that can be formed will be equal to the product of all the individual ways:
Total possible phone numbers = 8 x 10 x 10 x 10 x 10 x 10 x 10
Since, 1 of the given number: 867-5309 is not used, the total possible phone numbers will be:
Total possible phone numbers = 
Hence, option C: 7,999,999 give the correct answer.
Answer:
cos B = a/c
tan A = a/b
sin B = b/c.
Step-by-step explanation:
Sin = opposite / hypotenuse
cos = adjacent/ hypotenuse
tan = opposite/adjacent.
Answer:
243 in.²
Step-by-step explanation:
A = bh
⇒ A = 13.5 × 18 = 243
Answer:
see below
Step-by-step explanation:
We can name it by the vertex alone <Q
Or by three letters
<PQR or <RQP
The answer is 36°
Hope that helps, Good luck! (: