Answer:
1) 20%
2) Choice a.
Step-by-step explanation:

1)  is the population initially.
 is the population initially.
 is the population after a year.
 is the population after a year.
 represents the population increase factor.
 represents the population increase factor.
So let's evaluate that fraction:
 
 


0.2=20%
2) Let's figure out the population growth in terms of months instead of years.

We want t to represent months.
A full year is 12 months, in a full year we have that 
So we want a new P such that  since 12 months equals a year.
 since 12 months equals a year.
Let's look at the functions given to see which gives us this:
a) 
b) 
c) 
d) 
So a is the function we want.
Also another way to look at this:
 where
 where  is in years.
 is in years.
 where
 where  is in months.
 is in months.
And 
 
        
             
        
        
        
Answer:

Step-by-step explanation:

 
        
                    
             
        
        
        
The total surface area of the remaining solid is 48(4+✓3) centimeters square.
<h3>How to calculate the surface area?</h3>
Through a regular hexagonal prism whose base edge is 8 cm and the height is 12 cm, a hole in the shape of a right prism.
The formula for the total surface area will be:
= Total surface area=2(area of the base)+ parameter of base × height
where,
Height= 8cm
Parameter of base=12(2) = 24
Area of the base= 6×✓3/4×4² = 64✓3/4
The surface area of the remaining solid will be:
= 2(64✓3/4) + 24 × 8
= 2(64✓3/4 + 192
With the hole is a rhombus prism with the following parameters:
diagonal 1 = 6, diagonal 2 = 8, height = 12 
The volume is: 
V1 =0.5 × d1 × d2 × h
V1 = 0.5 × 6 × 8 × 12
V1 = 96
The dimensions of the hexagonal prism are:
Base edge (a) = 8
Height (h) = 12
The volume is
V2 = (3✓(3)/2)a²h
V2 = (3✓3)/2) × 8² × 12
V2 = 1152✓3
The remaining volume is
V = V2 -V1
V = 1152✓3 - 96
Learn more about the hexagonal prism on:
brainly.com/question/27127032
#SPJ4
 
        
             
        
        
        
2x<15
Step-by-step explanation:
2×15=30 if he spends less than he would have to be below 15 please give brainliest