Given a mean earth radius of 20,906,000 ft, and an observation latitude of n 42 degrees, what is the arc distance of one second of longitude and one second of latitude?

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.