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keke6429
06.04.2021 •
Mathematics
-10+5k^5 write in standard form
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Ответ:
Step-by-step explanation:
How to write numbers in standard form:
Write the first number 8.
Add a decimal point after it: 8.
Now count the number of digits after 8. There are 13 digits.
So, in standard form: 81 900 000 000 000 is 8.19 × 10¹³
Ответ:
What is the equation in standard form of an ellipse centered at the origin and vertex (4,0) and focus (1,0)
we know that
Standard form of equation for an ellipse with horizontal major axis is
(x-h)²/a²+(y-k)²/b²=1
the center is the origin
so
(h,k) is (0,0)length of horizontal major axis> 8=2a> a=4
a²=16
c=1 (distance from center to focal point)
c²=1
b²=a²-c²> b²=16-1> b²=15
the equation is
(x)²/16+(y)²/15=1
the answer is
(x)²/16+(y)²/15=1