china1283
06.11.2020 •
Mathematics
If the simple interest on $3000 for 3 years is $720 , then what is the interest rate?
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Ответ:
8%
Step-by-step explanation:
Starting Principal:$
3,000.00
Years:
3
Annual Interest Rate:
8
%
Results
Future Value, using...
Simple Interest:$
3,720.00
Annually Compounded Interest:$
3,779.14
Ответ:
Step-by-step explanation:
The vertex is halfway between focus and directrix, at (0,0).
The equation has the form y = ax².
Focal length p = distance between focus and vertex = 1
p = 1/|4a|
1 = 1/|4a|
|a| = ¼
The focus lies below the vertex, so the parabola opens downwards and a<0.
y = -¼x²