I'll give you a pdf so you can see it yourself and the correct answer is -32b - 32b
 
        
             
        
        
        
Answer:
a.) y = 3/(2ˣ)
b.) y = 1/(2ˣ)
c.) y = (π^π)ˣ
d.) y = (1/27)(1/√(3))ˣ
e.) y = .002908/(.119025ˣ)
f.) y = .00000004808/(.0413ˣ)
Step-by-step explanation:
Concept need to know is: 
- a negative exponent will flip the numerator with the denominator
 - a fraction as an exponent is just a root. so if the exponent is x^(1/2) then the root is 2 and x^(1/3) is a cube root
 
- adding and subtracting exponent is the same thing as multiplying the same base. 
 - so x^(1+2) = (x^1)(x^2)
 
- and x^(1-2) = (x^1)(x^-2)
 
 
        
             
        
        
        
Answer:
0.075 inches per year
Step-by-step explanation:
The average rate of change is measured as
( difference in diameter ) ÷ ( difference in years )
= ( 251 - 248 ) ÷ ( 2005 - 1965 )
= 3 inches ÷ 40 years
= 0.075 inches per year
 
        
             
        
        
        
Simply take the numerator (3) and denominator (7) and add them together. 
3+7 = 10, which means that the ratio will provide parts that are in multiples of 10 depending on the total
so take 10x = 800 
x = 80.
Then multiply this by the numerator and denominator 
3*80/7*80 = 240/560. 
        
             
        
        
        
First flip the bottom fraction:

After you simplify further you get: