Write the measurements 9cm into the place value Collom 9m. 9cm. 9mm

Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35

Ammonia molecules have three hydrogen atoms and one nitrogen atom.how many of each atom arein five molecules of ammonia

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?