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.  

"it's not the heat, it's the humidity".   that's a partly valid phrase you may have heard in the summer, but it's actually both.   the heat index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature.   this has important considerations for the human body's comfort.   when the body gets too hot, it begins to perspire or sweat to cool itself off.   if the perspiration is not able to evaporate, the body cannot regulate its temperature.   evaporation is a cooling process.   when perspiration is evaporated off the body, it effectively reduces the body's temperature.   when the atmospheric moisture content (i.e. relative humidity) is high, the rate of perspiration from the body decreases.   in other words, the human body feels warmer in humid conditions.   the opposite is true when the relative humidity decreases because the rate of perspiration increases.   the body actually feels cooler in arid conditions.   there is direct relationship between the air temperature and relative humidity and the heat index, meaning as the air temperature and relative humidity increase (decrease), the heat index increases (decreases).

step-by-step explanation: