Answer:
Step-by-step explanation:
Given : focus of (1, -3) and a directrix of y= -1
The distance between focus and directrix is 2p
The distance between (1,-3) and y=-1 is 2
So 2p = 2 and p =1
Vertex (h,k) lies inbetween the focus and directrix
focus is (h, k-p)
given focus is (1,-3)
so h=1 and k-p = -3 ( we got p =1)
So k-1= -3 , k= -2
Hence, vertex is (1,-2), h=1 and k = -2
Here focus at the bottom and directrix at the top
so parabola opens down
hence a= -1/4
Plug it in the equation
Answer:
41.42 grams
step-by-step explanation:
80.52 - 39.10 = 41.42 grams
Answer:
B
Step-by-step explanation:
arc length = circumference × fraction of circle
= 84 × = 21 cm