How many volleyball games would rana
have had to schedule if there were 10 teams
in the league and each team played each
other twice?

90 games

Step-by-step explanation:

Given: Total number of team (n) = 10

           Each team will play twice with each other.

We know that every team will play two game with each other except with itself, therefore each team will play

⇒ Each team will play =

∴ Each team will have 18 games with each other in the league.

Now, as there are total 10 teams and each team have 18 games each, however, we have to make sure that no team have more than two games with other team.

Example:

Both the above game are same and it is a mistake to take two different game.

∴ Total number of games played by all team=

⇒ Total games =

∴ Rana have to schedule 90 games in the Volleyball league.

cut 138 centimeters off

step-by-step explanation:

250-112 = 138

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;