What does ‘? m/s = 25.2 km/h’ mean and how do you complete it?
x

Step-by-step explanation:

This is a unit conversion problem it seems.

Basically, you're trying to take 25.2 km/h and turn that into m/s.

Let's convert hours to seconds first, so you can sort of see what I mean:

So now we've done the first part of the equation, dealing with hours to seconds. See how we now have seconds in the denominator instead of hours? (Keep in mind, we don't want to multiply everything until the very very end!)

Now let's turn kilometers into meters (kilo- means thousand):

Now that we have that, let's multiply out the full equation to get our answer!

Therefore our answer is the nice and satisfying 7.

7

f(x) = y

f(-3) = -5

step-by-step explanation:

"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: