Arecipe uses 6 cups of sugar for 15 people. at the same rate, how much sugar is needed for 40 people

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

Find the distance between c and d on the number line c=3 and d=11

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?