Answer:
the angle in degree is 30°
Answer:
y = -13.75x + 340
120 owls in 2019
Step-by-step explanation:
To find the population in a future year, use the formula y=mx+b since it changes linearly.
So over 4 years the owl population changed from 285-340=-55. Divide by 4 and this is a yearly change of -13.75. This is m.
The y-intercept is the starting point known as b in the equation. Here it is 340.
So the equation is y=-13.75x+340.
In 2019, t=16 so y=-13.75(16)+340 = 120.
X^2+2x-63
(x+9)(x-7)
since x is squared, you immediately know that it multiples itself. (x)(x) is x^2. I used the FOIL method where you do first, outside, inside, last. so the first amount in each parentheses is a x and a x. that equals x^2. then the outside numbers are 7 and a x. That equals-7x. on the inside, I have +9 and x. that is +9x. Lastly, a -9 and -7 is -63. When written out in a number sentence, and combine like terms, you will get your original answer so (x+9)(x-7) is the factored form
The surface area of a right cylinder equals 
As you can see in the attached picture, the surface area consists of two equal circles (bottom and top one) and area that would look like a rectangle, if "unraveled".
The formulae for the surface area of the circle is 
. You have to multiply it by two and add to the area of the "rectangle", which equals
where

is the circumference of the circle and

is the height of the cylinder.