Answer:
The value of x = 64. Hence, option A is correct.
Step-by-step Explanation:

We know that the rule:

can be represented as:

so

4³=x
x = 64
Thus, the value of x = 64. Hence, option A is correct.
Answer:
√5, 2, −13/5,−2, −9/4
Step-by-step explanation:
You basically just Calculate all of the numbers and order them from greatest to least, that's it.
Answer: 
Step-by-step explanation:
Given: An ice chest contains 3 types of drinks: 10 apple juries 15 grape juices and 15 bottles of water.
Total drinks= 10+15+15 = 40 (Total outcomes)
Number of drink that does not contain fruit juice = Number of bottles of water = 15 (Favorable outcomes)
The probability of getting a drink that does not contain fruit juice = 

So, the required probability =
.
Alright so I'm coming up with this on the fly; you have the first six letters (a,b,c,d,e,f) and 0-9 and your ten numbers. calculate the amount of possible combinations for the letters by simply writing them down.
ab, ac, ad, ae, a f- five
bc, bd , be, bf- four
cd, ce, cf- three
de, df- two
ef,- one.
adding these all together gets a total of 15 for the letters. now the numbers
01, 02, 03, 04, 05, 06, 07, 08, 09- nine
12, 13, 14, 15, 16, 17, 18, 19- eight
23, 24, 25, 26, 27, 28, 29- seven
34, 35, 36, 37, 38, 39- six
45, 46, 47, 48, 49- five
56, 57, 58, 59- four
67, 68, 69- three
78, 79- two
89- one
added together with a total of 45 combinations.
alright so, 45 different number combinations and 15 letter combinations. multiplying 15 by 45 should tell you the total possible combinations for a two letter and two number serial-number