Answer:
The sample size is 
Step-by-step explanation:
From the we are told that
The population proportion is p = 0.90
The margin of error is E = 0.01
From the question we are told the confidence level is 95% , hence the level of significance is
=> 
Generally the sample size is mathematically represented as
![n =[ \frac{ Z_{\frac{\alpha }{2} } }{E} ]^2 * p(1-p)](https://tex.z-dn.net/?f=n%20%20%3D%5B%20%20%5Cfrac%7B%20Z_%7B%5Cfrac%7B%5Calpha%20%7D%7B2%7D%20%7D%20%20%7D%7BE%7D%20%5D%5E2%20%2A%20p%281-p%29)
=> ![n =[ \frac{ 1.96 }{0.01} ]^2 * 0.90(1-0.90)](https://tex.z-dn.net/?f=n%20%20%3D%5B%20%20%5Cfrac%7B%201.96%20%20%7D%7B0.01%7D%20%5D%5E2%20%2A%200.90%281-0.90%29)
=>
Answer:
D. Rhombus.
Step-by-step explanation:
This will be a quadrilateral with 4 equal sides.
The oppsoite angles will be equal but they will not be 90 degrees as each triangle of the 3 dimensional figure is an equilateral triangle.
Therfore the cross section is a rhombus.
Answer:
360
Step-by-step explanation:
if the chicken sandwiches is 3/5 so
tuna sandwiches is 1-3/5=2/5
then tuna sandwiches is 240, we need solve how many all sandwiches
so 240÷2/5=600 but the question is how many chicken sandwiches were there, we only need to solve 600*3/5=360 this is answer.
if you next time don't know the question, you can tell me
Answer:
A. 8100
Step-by-step explanation:
85 x 86
To estimate, we multiply 85*100, which is the easiest multiplication, as a multiplication by 100 is the same as placing two zeros at the end of the number.
85*100 = 8500
Since 86 < 100, 85*86 < 8500. Thus, the correct estimate is given by option A.
Answer:
r^2 + 6rs - 4rd - 2d^2 + 3s^2
Step-by-step explanation:
3(r+s)^2 - 2(r+d)^2
PEMDAS
parenthesis, exponents, multiplication, division, addition, subtraction
in that order
3( r^2 + 2rs + s^2 ) - 2(r^2+ 2rd + d^2)
3r^2 + 6rs + 3s^2 - 2r^2 - 4rd - 2d^2
r^2 + 6rs - 4rd - 2d^2 + 3s^2
