Explanation:(a) Was this an observational study or an experiment? Explain your reasoning. Experiment, because certain variables were controlled (he sets the screen brightness to low and then starts a movie) to determine if iPhones last longer if the screen brightness is set to low, and it proves the cause and effect relationship.
(b) What is the explanatory variable and the response variable? Response Variable- To determine if iPhones last longer if the screen brightness is set to low Explanatory variable- he sets the screen brightness of 10 of the iPhones to high and starts a movie, then the other 10 to low and starts a movie.
(c) Was a random sample used to collect the data? Yes- “he selects a random sample of 20 brand new iPhones”
The figure is not marked in any way that would indicate it is a parallelogram. If we assume it is, then
... BE = DE
... 10x -3 = 8x -1 . . substitute the given expressions
... 2x = 2 . . . . . . . . add 3-8x
... x = 1 . . . . . . . . . . divide by 2
The appropriate choice is ...
... A. 1 unit
_____
Since the figure is not marked to indicate BE=DE, you could argue that any answer is correct.
Answer: the total is 4.0 yardage
Explanation: add 5.5 and 2.0 THEN subtract your total with the 3.5 and then you get the answer B)
Answer:
Because it does. No other answer. This is one of those Impossible to Answer questions from college.
Answer:
v=s cube
The rate of change is found using the first derivative of this function. This is often called the gradient function, because it gives the gradient of a tangent line drawn at the specified point.
dv/ds(s cube) =3s square
We now plug in s=6
3s square = 3(6) square =108 cm cube/ s
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