Answer:
Option C. -0.045
Step-by-step explanation:
we know that
The general exponential model to find the value of the dollar at some future time compared to its present value is equal to
where
F is the value of the dollar at some future time
P is the present value
r is the rate of increasing or decreasing in decimal (remember that the equation is general)
t is Number of Time Periods
In this problem
The rate is decreasing
so
r=-4.5%=-4.5/100=-0.045
Answer: B.pi/2
ABCD is a square
=> Δ ABD is a isosceles right triangle at A
using pythago theorem, we have:
AB² + AD² = BD²
=> 2AD² = 4
⇔ AD² = 2
⇒ AD = √2
through O, draw EF parallel to AD and BC
=> EF is diameter
because EF//AD => EF = AD = √2 (because circle O is inscribed the square ABCD)
=> the area of the circle is
Step-by-step explanation:
The height of tree is 8 feet
<h3><u>Solution:</u></h3>Given, Micah places a mirror on the ground 24 feet from the base of a tree
At that point, Micah's eyes are 6 feet above the ground
And he is 9 feet from the image in the mirror.
To find : height of tree = ?
Let "n" be the height of tree
From the question, we can see there is a directly proportional relationship between heights and distances.
Proportional relationships are relationships between two variables where their ratios are equivalent.
Hence, the height of the tree is 8 feet
