Let f(x) = 0.8x^3 + 1.9x^2- 2.7x + 23 represent the number of people in a country where x is the number of years after 1998 and f(x) represent the number of people in thousands. Include units in your answer where appropriate. (round to the nearest tenth if necessary)

a) How many people were there in the year 1998?

b) Find f(15)

c) x = 15 represents the year

d) Write a complete sentence interpreting f(19) in context to the problem.

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation:

the line of

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i cant fully remember all of the ranks, here are the ones i remember.

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answer: the proof is mentioned below.

step-by-step explanation:

since, given:   lines bc = ef

prove:   lines ac > ef

          statements                                           reason

1. bc=ef                                           1. given

2. ac= ab+bc                                 2. because b is the point between the  

                                                            line segment ac

3.   ac > bc                                       3. because if a line segment is equal to

                                                          the sum of two line segments then it is

                                                          always greater then each of these

                                                          individual line segments

4. ac > ef                                         4. by equality property.