39 because 6/3= 2 and 78/39 also = 2
Answer:
Refer the attachment for the answer
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Answer:
40 minutes
Step-by-step explanation:
12 envelopes every 10 minutes.
48 envelopes = 40 minutes
Answer: C. Parabola
Definition: a parabola is a conic section in which it is mostly characterised of having a U-shape wherein it is symmetrical and an open plane curve.
They are all correct good job