Calculate the total mass of 3 blocks of cheese each weighing 2.3 kg,4.75kg and 0.56kg respectively.​

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

15 point ! ~ see if you know the answer to both you!

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.