Roberto’s science grade is calculated using a weighted average quizzes are worth 25% homework is worth 10% unit tests are worth
2 answers:
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Given:
Consider the below figure attached with this question.
The value in the given figure are:
To find:
The exponential regression equation for the given values (Rounded to three decimal places).
Solution:
The general form of exponential regression equation is:
...(i)
Where, a is the initial value and b is the growth/decay factor.
The given values are:
Round these numbers to three decimal places.
Putting in (i) to find the exponential regression equation.
Hence, the correct option is C.
x = 7 and x = –7.
Solution:
Given data:
and
To find the solutions when f(x) = 64.
Both are equations of f(x), so equate the given equations, we get
To isolate the constant term subtract 15 from both sides.
49 can be written as 7².
Taking square root on both sides of the equation, we get
x = ±7
The solutions to f(x) = 64 is x = 7 and x = –7.