A tennis ball has a diameter of 12 cm. What is the volume of the tennis ball in cubic units? Assume that π = 3.14 and round to the nearest tenth when necessary.

Step-by-step explanation:

A tennis ball is a sphere  

Volume of a sphere ===> v= \frac{4}{3} \pi r^3    

Plug in the given info    

v= \frac{4}{3} (3.14) (6.7)^3    

Do the math to get a final answer of:    

v= \frac{4}{3} (3.14) (6.7)^3=1259.19cm^3  

tangent

step-by-step explanation:

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;