Pam and her brother both open savings accounts. Each starts with a zero dollar balance. For every two dollars Pam saves in her account, her brother saves five dollars in her account. Determine a ratio to describe the money in Pam's account to the money in her brother's account.

Acoin is tossed twice. let e e be the event "the first toss shows heads" and f f the event "the second toss shows heads". (a) are the events e e and f f independent? input yes or no here: yes (b) find the probability of showing heads on both toss. input your answer here: preview

Let r = 3. what is the value of r + 58?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?