If d is the midpoint of line ac, c is the midpoint of line ab, and bd=12, what is the length of line ab

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample