The quantity r in grams of a certain radioactive substance.

Iknow this isn't a question, but is there someway to ask a question under public safety or is there no category for it? i don't know if i'm overlooking it or not.

All of the following items are important to know when diagnosing an engine driveability problem except for thea. type of gasoline usedb. brand of engine oil usedc. temperature of the engine when the problem occursd. list of previous repairs

Steve has a rectangular gazebo in his back yard with a width of 3 feet less than times its length and an area of 156 square feet. what is the length of the gazebo, rounded to the nearest tenth?