Totally hectic day...(-_-)

if you already have the answer to (a), then just work out how many periods there are in 1 minute, and that's the answer to (c).

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper.

b would be the answer

answer: i'm not sure which is which for i get confused on it all the time but i can tell you that the answer lies with the convex and concave devices. i hope this you. have a good day and best of luck to you!

explanation: