161 1-foot tiles.
EXPLANATION:
To find how many tiles we need,
We must find the area of the kitchen.
To find the area, you multiply
length x width
In this question,
the length is 14
the width is 11.5
14 x 11.5 is 161.
So 161 1-foot tiles to cover the kitchen.
Hope this helps! Have a gud day!
Answer:

Step-by-step explanation:
Given:

Divide this equation by 2:

Note that

So, the previous equation is

Remind that

then

The solution of this equation is

Answer:
3.07% probability that the third oil strike comes on the fifth well drilled.
Step-by-step explanation:
For each oil drill, there are only two possible outcomes. Either there is a strike, or there is not. The probability that oil is striken in a trial is independent of other trials. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which
is the number of different combinations of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.
Strike oil with probability 0.20.
This means that 
Find the probability that the third oil strike comes on the fifth well drilled.
2 strikes on the first four drills(P(X = 2) when n = 4) and strike on the fifth(0.2 probability).


0.2*0.1536 = 0.0307
3.07% probability that the third oil strike comes on the fifth well drilled.