That’s how you plug it in and get the answer because when you plug in z and y value correctly you just have to follow the rule and simplify
So final answer would be +2
Answer:

Step-by-step explanation:
The formula for the surface area of a cylinder is:

And we want to solve for the height h.
First, subtract
from both sides. This yields:

Now, divide both sides by
. This yields:

And we're done!
Answer:
radians
Step-by-step explanation:
Arc length and radius is given. So, we need to know the arc length formula for a circle.
That is:

Where s is the arc length
r is the radius
is the angle (IN RADIANS)
We have:
s = 15.5
r = 9
Now, we substitute and find the angle:

The angle, in radians, in 1.72
Answer:
<em>1</em><em> </em><em>second</em><em> </em>
Step-by-step explanation:
<em>16t</em><em>^</em><em>2</em><em>+</em><em>64t</em><em>=</em><em>80</em>
<em>16t</em><em>^</em><em>2</em><em>+</em><em>64t-80</em><em>=</em><em>0</em>
<em>64</em><em>^</em><em>2-4</em><em>(</em><em>16</em><em>)</em><em>(</em><em>-80</em><em>)</em>
<em>9216</em>
<em>-64-96</em>
<em>______</em><em> </em><em>=</em><em> </em><em>-5</em>
<em> </em><em> </em><em> </em><em>32</em>
<em>-64</em><em>+</em><em>96</em>
<em>_______</em><em> </em><em>=</em><em> </em><em>1</em><em> </em><em>sec</em>
<em> </em><em> </em><em> </em><em> </em><em>32</em>