2.
Eight teams meet annually for a basketball tournament. The table below
shows each teams' probability of winning. Team 6 is from River City North;
team 7 is from River City South; and team 8 is from River City East. What is
the probability that a team NOT from River City will win the tournament?
-
Team
1
2
3
4
5
Probability
Team:
1. 0.07
2. 0.13
3. 0.05
4. 0.14
5. 0.16
6. 0.18
7. 0.21
8. 0.06

Choose from:

A. 37.5%
B. 55%
C.-45%
D. 62.5%

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places

the eight graders whould be the answer

step-by-step explanation: could you give me 5 stars