Hey pls help! try to complete this btw I only need 2 of them DONT answer the other questions tyyy take ur time but pls draw ur drawing and picture it if u can thank you so much have a good day!<33 this due today pls help! ( Spam BC no one is helping>:( ) THESE R MY LAST POINTS PLS HELP

An animal shelter has 21 puppies. if the puppies are 28% of the total dog and cat population , how many dogs and cats are in the animal shelter

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

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota