A confidence interval might be most appropriate during the early stages of a research project when little is known about the population's parameters and the project's researchers might still be gauging the parameters.

A) 90%
B) 95%
C) 99%
D) 100%

A 90% confidence

Step-by-step explanation:

99% confidence interval often used in scientific or medical research when making a wrong conclusion about a population parameter is very costly

95% confidence level in the field of statistics and is seen far more than any other confidence level

While 90% confidence interval might be most appropriate during the early stages of a research project when little is known about the population's parameters 

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

answer: solve 5\cdot 2^x=2405⋅2  

x

=2405, dot, 2, start superscript, x, end superscript, equals, 240.

solution

to solve for xxx, we must first isolate the exponential part. to do this, divide both sides by 555 as shown below. we do not multiply the 555 and the 222 as this goes against the order of operations!

\begin{aligned} 5\cdot 2^x& =240 2^x& =48 \\ \end{aligned}  

5⋅2  

x

2  

x

​    

=240

=48

​

step-by-step explanation: