If sin(A) is 2/5 and DH is 3 what is FG

Apool measures 100 meters by 100 meters a toddler inside the pool and trows a ball 60 centimeters from one edge of the pool. how far is the ball from the opposite edge of the pool

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me