Answer:
See Below
Step-by-step explanation:
The surface area of cylinder is given by the formula:
Where
r is radius ( diameter is 4, so radius is 4/2 = 2)
h is height ( h = 9)
Lets find original surface are:
<u>Halving diameter:</u>
diameter would be 4/2 = 2, so radius would be 2/2 = 1
So, SA would be:
<u>Halving height:</u>
Height is 9, halving would make it 9/2 = 4.5
Now, calculating new SA:
Original SA is 
,
Halving diameter makes it 
Halving height makes it 
So, halving diameter does not have same effect as halving height.
Hey there!
The interior angles of a triangle equal 180.
We can use this and the measures of the angles we are given to find the missing interior angle.
50+93=143
180-143=37
Since the missing angle (37) and angle x are supplementary, they add up to 180 as well.
37 + x = 180
180 - 37 = 143
x = 143
Hope this helps!
Answer:
C. 9
Step-by-step explanation:
y = -4x^2 + 2kx
subtitute 3:
y = -4(9)^2 + 2k(9)
y = -4(81) + 18k
let y = 0
=> 0 = -324 + 18k
=> k = 324/18 = 9
this is my calculations hope it helps
Answer:
36
Step-by-step explanation:
since the .77 is larger than .5, you automatically round it up
I think its 18.24 because if you multiply it by 3.14 then subtract u should get 18.24
