Connor found that 60% of 40 is the same as 25% of another number, n. what is the value of n?

What is the total surface area of this square pyramid?

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

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?