2,700 / 12 = 225
225 / 5 = 45
They can make 45 necklaces.
<span>204
First, lookup a standard normal table and see what the z-score is for 0.025 (one half of 100% - 95%) to allow for equal sized tails. You should find that the z-score is 1.96. That means that 95% of the time, the value should be within 1.96 standard deviations of the mean. Now let's calculate the standard deviation.
800 is 800 - 1200 = -400 to the left of the mean of 1200.
1600 is 1600 - 1200 = 400 to the right of the mean of 1200.
So we are an equal distance of 400 on both sides of the mean. And we know from the z-score of 1.96, that we're 1.96 standard deviations from the mean. So a little division will give us the standard deviation. Which is:
400 / 1.96 = 204.0816327
So the standard deviation of the light bulbs is 204</span>
Answer:
Step-by-step explanation:
Here, the given expressions are:
A) 
Solving this, we get
⇒
B) 
Now, solving this, we get
⇒
C) 
Simplifying this, we get
⇒ 
Answer:
r = 49
Step-by-step explanation:
686 = 14r
686/14= 49
r = 49
Answer:
A
Step-by-step explanation:
