Answer: C. 12.5
Step-by-step explanation:
Given : A manufacturer of new light bulbs claims the average lifetime of its long-life bulb is more than 4000 hours.
Population mean :
Sample size : n= 100
Sample mean :
Standard deviation:
The value of test-statistic is given by :-
Hence, the value of the test statistic for this problem is 12.5.
Think about this. What do the numbers in a coordinate stand for? They stand for X and Y. If you're trying to figure out what the X is, wouldn't you be solving for x? And didn't they just give you an equation? ;) First off, do you see how the "Y" value is given to you in the coordinate? All you have to do is substitute that 3 in for the "y" in the equation! 3=2x+5. Hey.... that looks like a simple equation! First, you need to subtract 5 from the other side of the equation. Now you're left with 2x=-2. Divide both sides by 2, and you get that x=-1. Now, just substitute that "x' value into the coordinate, and your answer should come out to be (-1, 3). :D
Answer: its 45 if i read it right.
Step-by-step explanation:
The formula for finding the volume of a cube is
, where s is the side length.
The formula for a cube with each side length doubled is
, or 8<span>s.
</span><span>If all the dimensions of a cube are doubled, then the new volume is
eight times greater.</span>
x = 8
Since x = 8, you can plug in/substitute 8 for "x" in the equation:
2.82842
2.83 You answer is the 4th option
x = 9
Plug in 9 for "x" in the equation
4 Your answer is the 1st option