The surface area of a ball is 3,600x square millimeters. what is the ball's radius?
recall the formula sa=42
15 mm
21 mm
30 mm
450 mm

30 mm

Step-by-step explanation:

Given,

Surface Area of ball =

We have to find out the radius of the ball.

Solution,

Since the formula of Surface area is 4 times π times square of the radius.

We can frame it as;

Now on substituting the values, we get;

On dividing both side by 'π' using division property, we get;

On dividing both side by '4' using division property, we get;

Now taking square root on both side, we get;

Hence The radius of the ball is 30 mm.

"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: