For every $5 marta earns mowing lawns, she put $2 in her savings account. how much money will she have to earn in order to deposit $30 into her savings account

Why are slanted roofs found on many buildings within russia and finland? a. to prevent ice slides. b. to prevent the build-up of water during heavy rains. c. to prevent heat from escaping during the clod winter months. d. to prevent snow build-up.