Please Help me solve this

28 shaded triangles

Step-by-step explanation:

First, we have 0 shaded triangles.

Then we have 1 shaded triangle

then we have 3 shaded triangles

then we have 6 shaded triangles

In each new triangle, we add a base with a larger number of triangles.

In the base of the fourth triangle we have 3 triangles, then in the next triangle we have a base of 4 triangles, then we have 4 + 3 + 2 +1 triangles = 10 triangles.

in the sixth triangle the base has 5, so here we have 5 + 4+ 3 + 2 +1 = 15 triangles

in the seventh the base has 6 triangles, so here we have 15 + 6 = 21 shaded triangles

and in the height triangle, the base has 7 triangles, then we have 28 shaded triangles

change of stock price/initial stock price on friday * total stock value = change of stock value

0.89/73.73 *x = 42.72

x=3539.04 = total stock value at initial stock price on friday .

total stock value at initial stock price on friday/ initial stock price on friday = number of shares

3539.04/73.73 = 48 shares

they own 48 shares of this stock

ωєℓℓ ωιтн тнαт ιиfσ

тнє вαѕє ιѕ 30

αи∂ тнє нєιgнтн ιѕ 30

нσρє ι ¢συℓ∂ нєℓρ