Answer:

Step-by-step explanation:
Given



Orchestral =  of music practice time
 of music practice time 
Required
Determine time spent on orchestral pieces
From the given parameters, we have:
Orchestral =  of music practice time
 of music practice time 
Substitute  for music practice time.
 for music practice time.
So, we have:



 
        
             
        
        
        
Answer: 90°
Step-by-step explanation:
A measure of central tendency is a single value that attempts to describe a set of data by identifying the central position within that set of data. ... The mean (often called the average) is most likely the measure of central tendency that you are most familiar with, but there are others, such as the median and the mode.
 
        
             
        
        
        
He should evaluate the function f(x)=−1/3 x+4 for x=3  , Option D is the correct answer.
<h3>What in Interpolation ?</h3>
Interpolation is when the line of best fit is used to determine the value of a point that is within the range of plotted points. 
It is given to find the value at Day 3 which lies in the range of the points used for plotting
The line for best fit is 
f(x) = (-1/3)x +4
At x = 3
f(3) = (-1/3) * 3 +4
f(3) = -1+4 = 3
Therefore He should evaluate the function f(x)=−1/3 x+4 for x=3 
Option D is the correct answer.
To know more about Interpolation
brainly.com/question/18768845
#SPJ1
 
        
                    
             
        
        
        
Well this problem can be solved with Algebra
the rule here is that for every incrementing sequence you increase your number by 6.
T(n)=18+6(n-1)
for 603 to be in the sequence, it has to male sense with the function above
603=18+6(n-1)
603-18=585
585=6(n-1)
n-1=(585/6)
n=(585+6)/6
n=591/6
here is your answer.
        
             
        
        
        
The answer is A 5^11 I hope that's right