Ascientist is looking at 1000 germs under a microscope
andfinds that the germs double in number every 4 hours.
using,
how many germs will there be in 7 hours.

3500

Step-by-step explanation:

Number of germs that a scientist can see under a microscope = 1000 germs

We need to find how many germs will there be in 7 hours if the germs double in number every 4 hours .

It's given that the germs double in number every 4 hours .

So, increase in number of germs in one hour =

Increase in number of germs in seven hours =

Therefore , number of germs in 7 hours = Increase in number of germs in seven hours × Number of germs initially

=

So, number of germs in 7 hours if the germs double in number every 4 hours = 3500

b: |12 – x| ≤ 0.25

step-by-step explanation:      

let x be the possible lengths in inches, of the ribbons jaime cut.

we have been given that jaime is cutting strips of ribbon for a project. he tries to cut each piece to be 12 inches long, but sometimes he cuts it too long or too short by as much as 0.25 inch.  

we can represent this information in an inequality as:

by the definition of absolute value function we will get,

upon combining our inequalities we will get,

therefore, the inequality   describes all the possible lengths (x), in inches, of the ribbons jaime cut.

step-by-step explanation: