Answer:
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Step-by-step explanation:
X is less than or equal to 4
Answer:

Step-by-step explanation:
We know that the transformations of a cosine equation can be shown as:
y=±a(b(x-h))+k
Where 'a' is the amplitude
'b' is the horizontal change (Do 2π/b to find the period)
'h' is the horizontal shift
and 'k' is the vertical shift or midline.
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If the amplitude is 4, we can assume a=4.
Since the period is 4/7, we can solve for the 'b' value by:

Next, since the midline is 2, we know that a vertical shift of 2 occurred. Thus, the 'k' value is 2.
Writing this equation gives us:

Step-by-step explanation:
Let
c = 11.5 cm
a = 8.9 cm
b = ?
Since this is a right triangle, we can use Pythagorean theorem to find the length of side b:


Taking the square root of the equation above, we get


7 goes into 38 five times with a remainder of 3.....of 5.43 when rounded