Șapte prieteni au obținut ca punctaj la Olimpiada de matematică doar numere naturale nenule și cel puțin doi dintre ei au primit note diferite. Știind că suma punctajelor este 49, aflați care este cel mai mare divizor comun al notelor obținute la olimpiadă de cei șapte copii.

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