The table below shows the probability distribution of students in a high school with 1500 students. What is the expected value for the age
randomly chosen student?

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?

When steve woke up. his temperature was 102 degrees f. two hours later it was 3 degrees lower. what was his temperature then?

Afield is shaped like the figure shown