At the beginning of the day, the sum of the stocks in the dow jones was $10,335.24. at the end of the day, the sum of the stocks in the dow jones was $10,215.78. what was the rate of change of the dow jones on this particular day?

a. –1.2%

b. 1.2%

c. –1.3%

d. 1.0%

A. –1.2%

Step-by-step explanation:

Since, the initial sum of the stocks = $ 10,335.24

While, the final sum of the stocks at the end of the day = $ 10,215.78

Thus, the percentage change in the sum of stocks

=

=

=

=

=

⇒ Option A is correct.

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3