Answer:
it is 9
Step-by-step explanation:
adding 79 and 10 and subsequently subtracting 72 and 8 to get 9
<h2><u>
Answer with explanation</u>
:</h2>
Let
be the average life of light bulbs.
As per given , we have
Null hypothesis : 
Alternative hypothesis : 
Since
is right-tailed and population standard deviation is also known, so we perform right-tailed z-test.
Formula for Test statistic : 
where, n= sample size
= sample mean
= Population mean
=population standard deviation
For
, we have

Using z-value table , Critical one-tailed test value for 0.06 significance level :

Decision : Since critical z value (1.5548) < test statistic (1.6180), so we reject the null hypothesis .
[We reject the null hypothesis when critical value is less than the test statistic value .]
Conclusion : We have enough evidence at 0.06 significance level to support the claim that the new filament yields a longer bulb life
Answer:
57
Step-by-step explanation:
EGB and EHD are the same angles.
A unit rate is when you find a rate when one variable (or value) is equal to one.
Let's find the unit rate for the price of the bananas.
1.98/6= 0.33
It is 33 cents for one banana. That is the unit rate.
I hope this helps!
~kaikers