There are 431 different species of fish and other wildlife at an aquarium. The aquarium has advertised the addition of 74 new species of fish, 8 new species of crustaceans and 9 new species of sharks.
How many species of fish and wildlife will the aquarium be home to?

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations