The johnston’s family plan to add a room to their house. the new 18’ x 20’ room will cost a average of $70 per square foot . the built in book shelves will cost $3,100 more what will be the total cost ?

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

3/4 = c/36 i need with this fraction proble.

Libby built a fence that was 56 \text { feet}56 feet long over 44 days. she built the same length of fence each day. how many inches of fence did libby build each day?