Kristen is filling water bottles for a bicycle race. The number of hours she expects to be on the course will affect how many water bottles Kristen prepares.

h = the number of hours Kristen expects to be on the course
w = the number of water bottles Kristen prepares

Which of the variables is independent and which is dependent?

The total of water bottles becomes dependent of the hours taken and how data changes this can establish a true time frequency through multiplying together last stage. These 3 totals can also be multiplied if being asked for the mean. However is they are lined up in 2 data lists then added totals on each list are made as step one and multiplication of the individual untotaled totals can show a 3rd total. The mean of such data to understand loss of time in any sequence of repeat changed data the multiple of 3 totals above of one set data= Totals = independent w x independant h  = mean dependent (f) where totals for bottles per hour can be arranged in groups and totaled separately as both stay independant. so that = tw x th x f  becomes the mean.

Step-by-step explanation:

It can only become an independent mean and value when 2 multiple totals are sought before any mean is required, as hours increase this is one total, amount of bottles filled is two values.- matched up in such list can show bottles and hours taken, but showing average for example would require discreet mean calculations. Mean test and (frequency) expands such understanding.

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

answer4 to the second power is 16

and 4 to the third power is 64,