Answer:
 c) t-test of population mean 
Explanation:
The t-test statistic is used in hypothesis testing. Here we would use a one sample t test to test our hypothesis. The one sample t test measures the statistical difference between the hypothesized mean and the sample mean. In a one sample t test or single sample t test, a test variable is measured against a test value. 
Example we compare our test variable to the hypothesized mean value $75 above.
The t test is used instead of z score when standard deviation is unknown.
Using the t test, we either accept or reject the null hypothesis given alternative hypothesis.
 
        
             
        
        
        
8 * 2 * 10 = 160 * 10 = 1600
        
             
        
        
        
Using scientific notation, the correct statement is given by:
C. Corporation C owns the most land. Corporation A owns 8 times more land than corporation B.
<h3>What is scientific notation?</h3>
A number in scientific notation is given by:

With the base being  .
.
Considering the amounts in scientific notation, the standard amounts in acres of each corporation are given as follows:
- Corporation A:  . .
- Corporation B:  . .
- Corporation C:  . .
Hence corporation C owns the most land. 320,000/40,000 = 8, hence Corporation A owns 8 times more land than corporation B, and statement C is correct.
More can be learned about scientific notation at brainly.com/question/16394306
#SPJ1
 
        
             
        
        
        
Answer:
37
Step-by-step explanation:
59 percent times 63 in total marbles is 37
 
        
             
        
        
        
Answer:
C
Step-by-step explanation:
Just took the test