Over the course of a year, a classroom went from 15 students to 19 students. use the drop-down menus to build an equation that could be used to find the percent change, p , in the number of students.

The percentage change is 26.7 % .

Step-by-step explanation:

Formula

Where change in value = Final value -  initial value

As given

Over the course of a year, a classroom went from 15 students to 19 students.

Here

Final value = 19

initial value = 15

Put in the above

change in value = 19 - 15

                            = 4

Put in the percentage formula

Percentage change = 26.7 % (Approx)

Therefore the percentage change is 26.7 % .

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)