Answer:
16. D
17. B
I'm not sure about the other ones sorry
Answer:
9.54731702 astronomical units
Step-by-step explanation:

Substitute this value in the equation above:

⇒ 
⇒

Hence, its distance from the sun is 9.54731702 astronomical units.
Answer:
Here,
slope (m)=-2
y- intercept (c)=-7
Now,
The equation of the line;
or,y=mx+c
or,y= -2x-7
or,2x+y+7=0 is the required equation....
Answer: ( 12 , 9 )
Step-by-step explanation:
The formula for finding the coordinate of points when a line is externally divided in a given ratio is given by :
x = 
y = 
From the question
= 2
= ?
x = 4
= -1
= ?
y = 1
p = 1
q = 4
substituting the values into the formula ,we have
x = 
4 = 
4 = 
+ 8 = 20
= 12
Also
y = 
1 = 
- 4 = 5
= 9
Therefore , the end of the stencil is located at point ( 12 , 9 )