105 i think nvm not corrupted picture
 
        
             
        
        
        
Option (A) :  least: 10 hours; greatest: 14 hours
The function f(x) = sin x has all real numbers in its domain, but its range is 
−1 ≤ sin x ≤ 1. 
How to solve such range questions?
Such questions in which every term is in addition and its range is asked is simplest ones to solve if we know the range of each of term. This can be seen from this question
Given: d(t) = 2sin(xt) + 12
=  −1 ≤ sin (xt) ≤ 1. 
=  −2≤ 2 sin (xt) ≤ 2. 
=  10 ≤ 2sin (xt) + 12 ≤ 14
=   10 ≤d(t) ≤ 14
Thus  least: 10 hours; greatest: 14 hours
Learn more about range of trigonometric ratios here :
brainly.com/question/14304883
#SPJ4
 
        
             
        
        
        
3. .5*60 because .5 represents the 5% and "of" stands for multiplication
        
                    
             
        
        
        
IDK!!!!! EXPLAIN AND SPECIFY!!!!
 
        
             
        
        
        
2x+4-3x>-1
-x+4>-1
-x>-1-4
-x>-5
X<-5/-1
Hence x<5