Answer:
217
Step-by-step explanation:
1/2 * 12 * 7 = 42 this is one side of the pyramid
4x for all sides = 168
add the bottom which is just a square 7*7 = 49
168 + 49 = 217
Answer:
x=−1 and y=−5
Step-by-step explanation:
hope this helps
Answer:
n=10
Step-by-step explanation:
You need n to be 10 because: y^20= (y^10)^2
First, determine the z-score of 675.
z = (675 - 500) / 100 = 1.75
The z-score of 500 is,
z = 0.
Subtracting the z-scores will give us 1.75. This is equal to 0.9599.
= 0.9599 - 0.5 = 0.4599
Multiplying this to the given number of light bulbs,
n = 0.4599 x 5000 = 2299.5
Therefore, there is approximately 2300 light bulbs expected to last between 500 to 675 hours.
Somewhere in the text, it must say that x = 2 and y = -1 or else, the values just seem made up out of thin air.
