Answer:
a
Step-by-step explanation:
Answer:
The minimum sample size is 
Step-by-step explanation:
From the question we are told that
The confidence interval is 
The margin of error is 
Generally the sample proportion can be mathematically evaluated as



Given that the confidence level is 98% then the level of significance can be mathematically evaluated as



Next we obtain the critical value of
from the normal distribution table
The value is

Generally the minimum sample size is evaluated as
![n =[ \frac { Z_{\frac{\alpha }{2} }}{E} ]^2 * \r p (1- \r p )](https://tex.z-dn.net/?f=n%20%20%3D%5B%20%5Cfrac%20%7B%20Z_%7B%5Cfrac%7B%5Calpha%20%7D%7B2%7D%20%7D%7D%7BE%7D%20%5D%5E2%20%2A%20%20%5Cr%20p%20%281-%20%5Cr%20p%20%29)
![n =[ \frac { 2.33}{0.1} ]^2 * 0.475(1- 0.475 )](https://tex.z-dn.net/?f=n%20%20%3D%5B%20%5Cfrac%20%7B%202.33%7D%7B0.1%7D%20%5D%5E2%20%2A%20%200.475%281-%200.475%20%29)

Answer:
-28
Step-by-step explanation:
2xy=2(7)(-2)=14(-2)=-28
Answer:

Step-by-step explanation:
Given

Required
Rewrite using scientific notation, then find n

Express as fraction

This can be splitted to

The first number must be between 1 and 10; hence, 25 can be expressed as 2..5 * 10

Apply law of indices


Comparing n, the given options

mama giraffe: x
baby giraffe: 
= 15
= (3)15
3x + 2x = 45
5x = 45
x = 9
baby giraffe:
=
= 2(3) = 6
Answer: 6 m