**Answer:**

0

**Step-by-step explanation:**

The probability of picking one red bean out of total 50 beans (one red and 49 whites). = 1/50

Now, chances of picking the one red bean out of a bag with 1 red bean and 49 white beans twice in a row is case of conditional probabilty where we can use the Product Rule of Probability

= 1/50*0/49 = 0 [ There is only one red and it is ready picked in the first draw]

Answer:

**____________________________________________________****{Note: Answer shown in attached figure, as well}.****____________________________________________________**** 1.0 * 10⁻¹² seconds in one picosecond ; **

**or, write as: 0.0000000000010 seconds in one picosecond; ****or, write as: 1 / (1.0 * 10¹²) seconds per picosecond .****______________________________________________________**

{See attached figure}.**_____________________________________________________****Explanation:****__________________________________________________**Given:

(3.6 * 10¹⁵ picoseconds) / 1 hr ; find out how many "picosecond(s)" in "1 second"?

**_________________________________________________________** [ (3.6 * 10¹⁵ picosec.) / (1 hr)] * (1 hr / 60 min) * (1 min / 60 sec)

= ?? picoseconds/ sec. ? ;

**__________________________________________________** → = [(3.6 * 10¹⁵) / (60*60)] picoseconds/ sec. ;

→ = [(3.6 * 10¹⁵) / (3600)] picoseconds/ sec. ;

→ = 1,000,000,000,000 picoseconds / sec. ;

→ = (to use "2 significant figures"), write as:

**__________________________________________**→ = 1.0 * 10¹² picoseconds /sec.

**__________________________________________** Note: The question asks, how many "fractions of a second" (i.e., how many second(s) is "one picoseconds".

**______________________________________** Since we have:

**________________________________________** (1.0 * 10¹² picoseconds) /sec. ;

→ then: 1 sec / (1.0 * 10¹² picoseconds) =

**________________________________________** → [ 1 / (1.0 * 10¹² picoseconds ] sec / picoseconds =

**________________________________________** → 0.000000000001 sec PER picosecond;

→ to rewrite; retaining 2 (TWO) significant figures;

**__________________________________________________**{continued; in this attached figure}:

**_______________________________________________**
**Answer:**

f=6

**Step-by-step explanation:**

**Answer:**

c

**Step-by-step explanation:**

47.83-15.91=31.92

Answer: 8

Step-by-step explanation: