The diameter of a standard basketball is 9.5 inches. if the basketballs are covered in rubber, what is the minimum amount of rubber needed to manufacture a set of four basketballs

1134.11495in^2

Step-by-step explanation:

SA=4x(pi)x(r)^2

4(pi)(4.75)^2=283.528737

283.528737x4(because there's four basketballs) =1134.11495

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;

is there supposed to be a diagram or a graph for this one? ?

step-by-step explanation: