Answer:Part a) 
Part b) When Jenny divides the square root of her favorite positive integer by
, the result is an integer.
Step-by-step explanation:
Let
x-------> the favorite positive integer
Part a)
1) For 
-----> the product results in an integer
thus
The number
could potentially be Jenny's favorite positive integer
2) For 
-----> the product results in an integer
thus
The number
could potentially be Jenny's favorite positive integer
3) For 
-----> the product results in an integer
thus
The number
could potentially be Jenny's favorite positive integer
Part B)
1) For 
-----> the outcome is an integer
2) For 
-----> the outcome is an integer
3) For 
-----> the outcome is an integer
Therefore
When Jenny divides the square root of her favorite positive integer by
, she obtains an integer as a result.
There were 30 adults and 10 children, totaling 40 attendees. Just sum them together.
Answer:
a) Ann has a 1/3 chance of winning in the first round
b) The chance of Ann winning for the first time in the fourth round is 8/81
c) The probability that Ann's first win occurs after the fourth round is 16/81
Step-by-step explanation:
a) Each strategy is played with a probability of 1/3. Given any strategy, there’s a 1/3 chance that Bill will choose the strategy that allows Ann to win. Consequently, the probability of Ann securing a victory in the first round (or any round) is
1/3 * 1/3 + 1/3 * 1/3 + 1/3 * 1/3 = 1/9 + 1/9 + 1/9 = 1/3.
Thus, the likelihood of Ann winning the initial round is 1/3.
b) The chances of Ann winning a round stand at 1/3; therefore, her chances of not winning are 2/3. This must happen three times before her first victory. Thus, the probability that Ann's first win occurs in the fourth round is
(2/3)³ * 1/3 = 8/81.
c) The first victory happens after the fourth round if she remains unsuccessful in the first four rounds, translating to a possibility of (2/3)⁴ = 16/81.
Answer:
Step-by-step explanation:
Considering the differential equation x^4(dy/dx) + x^3y = -sec(xy). We will solve it employing the method of separation of variables;

By substituting v and dv/dx into the previous equation, we acquire;

We then separate the variables:


The end expression provides the solution to the differential equation.