Answer:
90^4 = 65.61% chance of doing that
Step-by-step explanation:
I believe the answer is
D
Answer:
Open dot on positive 2, arrow going to the left <----0
Step-by-step explanation:
We have that the value of x is mathematically given as
x=3
<h3>Arithmetic</h3>
Question Parameters:
4x-7=5
Generally the equation for the Question is mathematically given as
4x-7=5
Therefore
![x=\frac{5+7}{4}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B5%2B7%7D%7B4%7D)
x=3
Therefore
Value of x is
x=3
For more information on Arithmetic visit
brainly.com/question/22568180
Answer:
1705
Step-by-step explanation:
This is a sequence where the first term, a=5
Since each girl tells 4 other people, the number of people told after the first hour =20
Each subsequent hour, each person that knows the rumor continues to tell four more people about it.
Therefore we have the sequence: 5, 20, 80,...
This is a geometric sequence in which the:
- First term, a=5
- Common ratio, r=4
To determine the number of people, y who have heard the rumor after x hours, we simply find the sum of the geometric sequence.
![\text{Sum of a Geometric series},y=\dfrac{a(r^x-1)}{r-1} \\$After 5 hours, x=5\\y=\dfrac{5(4^5-1)}{4-1} \\y=\dfrac{5(1023)}{3}\\\\y=1705](https://tex.z-dn.net/?f=%5Ctext%7BSum%20of%20a%20Geometric%20series%7D%2Cy%3D%5Cdfrac%7Ba%28r%5Ex-1%29%7D%7Br-1%7D%20%5C%5C%24After%205%20hours%2C%20x%3D5%5C%5Cy%3D%5Cdfrac%7B5%284%5E5-1%29%7D%7B4-1%7D%20%5C%5Cy%3D%5Cdfrac%7B5%281023%29%7D%7B3%7D%5C%5C%5C%5Cy%3D1705)
Therefore, the total number of people who know about the rumor after five hours is 1705.