Apopulation of insects doubles every month. if there are 100 insects to start with, how many will there be in 7 month

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Given: △acm, m∠c=90°, cp ⊥ am , ac: cm=3: 4, mp-ap=1. find am.

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?