Help. I don’t understand

Martha holding on to stocks that have poor market performance for three years is clearly an investing mistake.

Sanjay, Silvia and Sabrina seem to be making good investment decisions.

Ricardo is probably making a good decision too.

Step-by-step explanation:

I'm not sure that I can be of great help, because I have not read the Tutorial for this unit.

For me it is hard to tell about Ryan. I wonder what the Tutorial says. The fact that he has complete faith in a company may mean he has done a lot of research and understands the potential for the company to be profitable. But his faith in the company may be based on advertising or familiarity with a product. There may be other opportunities to invest in lesser known companies-- taking a risk may lead to opportunity. Maybe he should consult his stock broker or financial adviser.  

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it