Answer:
c. amplitude: 1; period: 
Step-by-step explanation:
The given function is 
This function is of the form;

where
is the amplitude.
When we compare
to
, we have
, therefore the amplitude of the given cosine function is 
The period is given by;

Since B=1, the period is 
Answer:
−x2 + 2x − 15 = x2+3 squared right triangle
Step-by-step explanation:
Answer:
21 cm
Step-by-step explanation:
Call the triangle ABC, with the right angle at B, the hypotenuse AC=25, and the given leg AB=10. The altitude to the hypotenuse can be BD. Since the "other leg" is BC, we believe the question is asking for the length of DC.
The right triangles formed by the altitude are all similar to the original. That means ...
AD/AB = AB/AC . . . . . . ratio of short side to hypotenuse is a constant
Multiplying by AB and substituting the given numbers, we get ...
AD = AB²/AC = 10²/25
AD = 4
Then the segment DC is ...
DC = AC -AD = 25 -4
DC = 21 . . . . . centimeters
Answer:
(c) 1.03 per year
Step-by-step explanation:
The relationship between "growth factor" and "growth rate" is ...
growth factor = 1 + growth rate
growth factor = 1 + 3% = 1.03