it took 2.5 gallons of paint to paint your bedroom wall, 8ft by 15ft. How many gallons will be needed to paint your living room wall , 12ft by 26 ft

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

The weight of an object in a particular scale is 175.2 lbs. the measured weight may vary from the actual weight by at most 0.1 lbs. what is the range of actual weights of the object

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.