The function f(x) is the height of a model rocket x seconds after launch.
the rocket reaches its maximum height in 2.5 seconds and hits the ground at 5 seconds.
what is the practical domain for the function f(x)?
[0, 5]
whole numbers in [0, 5]

all real numbers

all integers in [0, 5]

all real numbers in [0, 5]

or just [0, 5]

Step-by-step explanation:

The domain is all of the possible values for the independent variable, or x-values. For this problem, it is the time in seconds.

The information we are given about seconds is:

2.5s to reach max. height

5s to hit ground

We assume it starts at 0s

The domain must include the values 0, 2.5, and 5.

Whole numbers are non-partial numbers starting 0 counting up.

Integers are non-partial numbers, positive and negative, and includes 0.

Real numbers are all partial and non-partial numbers, positive and negative.

Since the domain must include 2.5, a partial number, the domain must be real numbers. The rocket launches at 0s and stops flying after 5s, so the domain is between 0 and 5.

Domain is all real numbers in [0, 5]

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies