Both squares and rectangles have 4 right angles, so a square doesn't have any more equal angles than a rectabgle
The notation x ≥ 0 means that a is greater than or equal to x (or, equivalently, not less than x, or at least x),; "not less than" can also be represented by the symbol for "less than" bisected by a vertical line, "not."
Answer:
<em>The person on the ship can see the lighthouse
</em>
Step-by-step explanation:
<u>The Circle Function
</u>
A circle centered in the point (h,k) with a radius r can be written as the equation

Any point (x,y) can be known if it's inside of the circle if

The question is about a beam of a lighthouse than can be seen for up to 20 miles. If we assume the lighthouse is emitting the beam as the shape of a circle centered in (0,0), then its radius is 20 miles. Thus any person riding a ship inside the circle can see the lighthouse. This means that


The ship's coordinates respect to the lighthouse are (10,16). We should test the point to verify if the above inequality stands


The inequality is true, so the person on the ship can see the lighthouse
The <em>correct answer</em> is:
b.) –0.507x2 + 14.907x – 36.131
Explanation:
First we enter the data into a graphing calculator. The times are the x-coordinates and the temperatures are the y-coordinates; this is because temperature is dependent upon time.
After we enter this, we run a regression on the calculator. We will run the quadratic regression; the equation is of the form
y = ax²+bx+c.
The values we are given on a Casio fx-9860 gii are:
a = -0.507
b = 14.908
c = -36.136
This is closest to choice B.
It's -2 i have calculated it and that's what i got, if i'm wrong i'm sorry