The cells of a bacteria doubles in every 15 minutes. A scientist begins with a single cell. How many cells will be there after (a).4 hours (b)10 hours ? Express your answers in exponential form. pls help me

Step-by-step explanation:

Given that:-

So, we can concert 15 minutes to hours.

So,

60 minutes = 1 hour

1 minute = 1/60

15 minutes =

Okay, now we will apply first for 0.4 hours.

Now, second one:-

Hope it helps :D

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is