For how many days does the proliferative phase extend?

Explain the following: The first half of the menstrual cycle is called the proliferative phase as well as the follicular phase.

The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows: On how many days was the rainfall less than the mean rainfall.

A village, having a population of 4000, requires 150 litres of water per head per day. It has a tank measuring 20 m by 15 m by 6 m. For how many days will the water of this tank last ?

About how many times does th nymph of the periplaneta americana undergo moulting before becoming an adult?

A wheel makes 360 revolutions in one minute. Through how many radians does it turn in one second?

How many roots does the following equation possess 3^(|x|)(|2-|x||)=1 ?

Consider the argon atom. For how many electrons does this atom have m_(l) = 1 ?