Please help!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

S_A_V [24]3 years ago

8 0

Answer:

It should be the first one.

Step-by-step explanation:

sweet-ann [11.9K]3 years ago

7 0

Answer:

The one on the top.

Step-by-step explanation:

If a sign doesn't have the little line at the bottom, it doesn't include that number.

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A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimat

Contact [7]

Answer: a. n= 1068

b. n= 164

Step-by-step explanation:

The formula to find the sample size :

$n=p(1-p)(\dfrac{z^{*}}{E})^2$

, where p=prior population proportion , z* = critical z-value and E = Margin of error.

Here , let p=proportion of computers that use a new operating system.

Given : Confidence level = 95%

i.e. z* = 1.96 [by z-table]

Margin of error : E = 3% =0.03

a. If p is unknown , then we assume p=0.5

Then, $n=(0.5)(1-0.5)(\dfrac{1.96}{0.03})^2=1067.11111\approx1068$

i.e. n= 1068

b. p=0.96

Then, $n=(0.96)(1-0.96)(\dfrac{1.96}{0.03})^2=163.908266667\approx164$

i.e. n= 164.

6 0

3 years ago

Somebody help me please

luda_lava [24]

Set up both fractions as equal to each other then cross multiply to solve for x!
The picture will guide you through the process

7 0

3 years ago

I want to learn how to solve a slope problem

mina [271]

The slope (or average rate of change) formula is: $m= \frac{ y_{2}- y_{1} }{ x_{2}- x_{1} }$ . It is easy to remember as "slope is easy and fun, rise over run" where the y-values of the 2 points would be the "rise" and the x-values of the 2 points would be the "run" So with two points, you label one point as $( x_{1}, y_{1})$ and the other as $( x_{2}, y_{2})$ . Then you insert these points into the slope formula (m represents slope). So, $m= \frac{6-1}{-3-5}$ where (-3,6) is x2 and y2 and (5,1) is x1 and y1. It would simplify to $m= \frac{5}{-8}$ .