Answer:
$2,700
Step-by-step explanation:
Find the total donation amount by dividing 135 by 0.05:
135/0.05
= 2700
So, the class collected $2,700 in all
Answer: C) 133
Step-by-step explanation:
The formula to find the sample size is given by :-
![n=(\dfrac{z^*\cdot\sigma}{E})^2](https://tex.z-dn.net/?f=n%3D%28%5Cdfrac%7Bz%5E%2A%5Ccdot%5Csigma%7D%7BE%7D%29%5E2)
, where z* = Critical z-value
= Population standard deviation for prior study.
E= Margin of error.
As per given , we have
E= 5
The critical z-value for 90% confidence level is 1.645.
Substitute al;l the value sin the above formula , we get
![n=(\dfrac{1.645\times 35}{5})^2](https://tex.z-dn.net/?f=n%3D%28%5Cdfrac%7B1.645%5Ctimes%2035%7D%7B5%7D%29%5E2)
![n=(\dfrac{57.575}{5})^2](https://tex.z-dn.net/?f=n%3D%28%5Cdfrac%7B57.575%7D%7B5%7D%29%5E2)
![n=(11.515)^2](https://tex.z-dn.net/?f=n%3D%2811.515%29%5E2)
![n=132.595225\approx133](https://tex.z-dn.net/?f=n%3D132.595225%5Capprox133)
Hence, the minimum sample size needed is 133.
Thus , the correct answer is : C) 133
140 pages
1/3 of 300 is 100pages
20% of 200 (remaining pages) is 40
100 + 40 = 140
It’s 100°! I cause 75+75 = 150 and if the circle is 350 then 150-350 = 200 and 200÷2 is 100
Answer:
x=67
y=36
Step-by-step explanation:
x+y=103
2y=x+5