Answer:
Step-by-step explanation:
for this equation 
   d=st
 we can represent s as d/t
 we can represent t as d/s
 and in real world we have a lot of this type of equations
 some of them are,
  d=m/v  ( density = mass / volume )
  C = m.c  ( heat capacity = mass x specific heat )
 
        
             
        
        
        
The steps to use to construct a frequency distribution table using sturge’s approximation is as below.
<h3>How to construct a frequency distribution table?</h3>
The steps to construct a frequency distribution table using Sturge's approximation are as follows;
Step 1: Find the range of the data: This is simply finding the difference between the largest and the smallest values.
Step 2; Take a decision on the approximate number of classes in which the given data are to be grouped. The formula for this is; 
K = 1 + 3.322logN
where;
K= Number of classes
logN = Logarithm of the total number of observations.
Step 3; Determine the approximate class interval size: This is obtained by dividing the range of data by the number of classes and is denoted by h class interval size
Step 4; Locate the starting point: The lower class limit should take care of the smallest value in the raw data. 
Step 5; Identify the remaining class boundaries: When you have gotten the lowest class boundary, then you can add the class interval size to the lower class boundary to get the upper class boundary. 
Step 6; Distribute the data into respective classes: 
Read more about  frequency distribution table at; brainly.com/question/27820465
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The magnitude of the magnetic field in the central area inside the solenoid, in T is 0.0267 T
<h3>Magnetic field inside solenoid</h3>
The magnetic field inside the central area of the solenoid is given by B = μ₀ni where 
- μ₀ = permeability of free space = 4π × 10⁻⁷ Tm/A, 
- n = number of turns per unit length = 3,170 turns/m and 
- i = current in solenoid = 6.7 A
Since B = μ₀ni 
Substituting the values of the variables into the equation, we have
B = μ₀ni 
B = 4π × 10⁻⁷ Tm/A × 3,170 turns/m × 6.7 A
B = 4π × 10⁻⁷ Tm/A × 21239 A-turns/m
B = 84956π × 10⁻⁷ T
B = 266897.15 × 10⁻⁷ T
B = 0.026689715 T
B ≅ 0.0267 T
So, the magnitude of the magnetic field in the central area inside the solenoid, in T is 0.0267 T
Learn more about magnetic field inside a solenoid here:
brainly.com/question/25562052
 
        
             
        
        
        
Answer:
9. Option D, 2(3x + 5) and 6x + 10
10. 9 + 3 (10÷2) - 5² = -1
Hope this helps!
 
        
                    
             
        
        
        
I don't Clearly understand your question but I think it is 0.428571