Hat is the surface area of a sphere with a diameter of 16 cm

Three times the difference of federico’s age, and 4, increased by 7, is greater than 37. what are possible values of federico’s age?

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

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.