Question

plz help me!!! 2. Michael decided to put some money in the stock market. He checks at the end of each day to see if the value of the stock has increased or decreased. The table shows the change in his stock value, in dollars, for the first 3 days. Day Change in stock value ($) Day 1 +1.30 Day 2 +1.12 Day 3 Day 4 Day 5 (a) What was the total change in his stock’s value from Day 1 to Day 3? Show your work. (b) On Day 5, Michael said the total change in the stock value from Day 1 to Day 5 was zero. Give possible values for the changes on Day 4 and Day 5. Show your work Answer:

Answer 1

Answer:

2.

a. day 3 +1.04 day 4 +.96 day 5 + .88

b. because his money is decreasing by 8 cents a day

Step-by-step explanation:

1.30. l.12

-.08 -.08

=1.12. = 1.04

and so on

Answer 2

The total change in Michael's change in stock value is 3.36 and we have found that Michael was wrong in calculation.

What is arithmetic progression?

Arithmetic progression is a type of sequence which is having common difference in all the terms. The nth term of arithmetic progression is

a+(n-1)d where a is the first term, n is number of terms, d is the common difference.

How to calculate terms?

We have been given change in stock values of Michael as under:

Day            Change in stock value

1                          +1.30

2                         +1.12

If we calculate the difference in change of stock values which is

1.30-1.12=0.18.

We have taken the change in stock values as arithmetic progressions. Because change in stock values are decreasing by 0.18 , then  change in stock values of next 3 days are as under:

Day               Change in stock value

3                             1.12-0.18=0.94

4                             0.94-0.18=0.76

5                             0.76-0.18=0.58

The total change in Michael's stock value from day 1 to day 3=

=1.30+1.12+0.94

=3.36

The total change in Michael's stock value from day 1 to day 5=

=1.30+1.12+0.94+0.76+0.58

=4.70 which is not equal to zero , So he was wrong.

Hence the total change in Michael's change in stock value is 3.36 and we have found that Michael was wrong in calculation.

Learn more about arithmetic progression at https://brainly.com/question/6561461

#SPJ2