12. School guidelines require that there must be at least 2 chaperones for every 25 students going on a school trip. How many chaperones must there be for 53 students?

2 chaperones

27 chaperones

5 chaperones

4 chaperones

6

chaperones will be needed.

Step-by-step explanation:

1 to 25 students require (at least) 2 chaperones.

26 to 50 students require (at least) 4 chaperones.

51 to 75 students require (at least) 6 chaperones.

This is an example of use of the ceiling function.

The ceiling of a value  

x

(sometimes written as  

⌈

x

⌉

) is defined as the smallest integer greater than or equal to  

x

.

In the given example we are asked for

XXX

2

×

⌈

53

25

⌉

which is  

6

y=x+9

?

step-by-step explanation: