Please help me as soon as possible.

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

Gunpowder residue is most likely to show up where on a shooters hands

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?