The chart below contains the results of a survey of 25 students who were asked which musical instrument they play best. instrument played best instrument students violin 1 piano 6 guitar 2 drums 3 . what percent of the students responded to the survey?
12%
21%
48%
52%

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

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

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)