The answer is 621.33 because 600+20 is 620, 620+1 is 621, 621+0.3 is 621.3, 621.3+0.03 is 621.33 and 621.33+0 is 621.33 :))
First, we substitute the numbers to the corresponding variables.
|(8) + (-15)|
And we change the plus sign since we’re just basically subtracting.
|8 - 15|
|-7|
Now to do absolute values, we must remember that it will always equal a positive unless there is a negative sign outside of the | |.
So the final answer will be 7.
Answer: The height is roughly 20 mm
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Explanation:
Let's find the area of the circular base
This circle has a radius of 12, so r = 12
Plug this into the area of a circle formula to get...
A = pi*r^2
A = pi*12^2
A = pi*144
A = 144*pi
A = 144*3.14 <<-- replace pi with 3.14
A = 452.16
The area of the circle is roughly 452.16 square mm
There are two of these faces, so 2*A = 2*452.16 = 904.32 represents the total base area
The lateral surface area is unknown. Let's call it L for now. If we add the total base area (904.32) to the lateral surface area (L), we would get the complete surface area which is given to be 2411.52
So,
904.32+L = 2411.52
904.32+L-904.32 = 2411.52-904.32
L = 1507.2
The lateral surface area is roughly 1507.2 square mm
The formula for the lateral surface area of a cylinder is
L = 2*pi*r*h
We found L = 1507.2 and we know that r = 12, so let's use this to find h
L = 2*pi*r*h
1507.2 = 2*3.14*12*h
1507.2 = 75.36*h
1507.2/75.36 = 75.36*h/75.36
20 = h
h = 20
The height is roughly 20 mm
Answer:
8 ft
Step-by-step explanation:
The area (A) of a triangle = 
bh
where b is the base and h the perpendicular height
Using b = 20 and h = 12, then
A = 0.5 × 20 × 12 = 120 ft²
Using b = 30 and perpendicular height = h, then
0.5 × 30 × h = 120
15h = 120 ( divide both sides by 15
h = 8
54 square inches
Basically you just multiply
