rscott400
29.04.2021 •
Mathematics
Pl if you are stalker don't even think to answer something with here's a link some please help me answer my question below! pl!!!
Question:
You need to buy some fabric to make the masks. You know that you can make 3 1/2 masks with 2 yards of fabric, but you want to make 80 masks. How much fabric do you need to buy?!
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Ответ:
I hate ppl who put links they're b1tchs
Step-by-step explanation:
Ответ:
46 yards of fabric
Step-by-step explanation:
Ответ:
option:A
Vertex: (0,0)
Focus: (0,-4)
Directrix: y=4
focal width: 16
Step-by-step explanation:
Part 1:we are given a equation of a parabola as:
on converting the equation of parabola into the standard form of:
we have vertex as (h,k).
so here the equation is converted as:
we have h=0,k=0 and p= -4
so, we have vertex as (0,0).
now the focus is given as (h,k+p)
hence focus is:(0,-4)
directrix is given by the formula y=k-p
Hence, directrix is:y=4.
focal width of a parabola is given by |4 p|
Hence, Focal width is: 16.
Hence, option A is correct.