Steps:
All cans take on the shape of a cylinder, unless you have seen interesting shape of cans like a starfish.
The formula for surface area of a cylinder is
SA = 2πr2 + 2πrh
where:
r = radius
h = height
Since we know the surface area and height, we can plug them in. Note that we can factor out the 2π. You will see why we factor out 2π rather than 2πr.
2π(r2 + (20)r) = 396
2π(r2 + 20r) = 396
Divide both sides of the equation by 2π to isolate the r terms.
r2 + 20r = 63.025
Subtract 63.025 on both sides of the equation.
r2 + 20r - 63.025 = 0
Use the quadratic formula to solve for r:
r = (-b ± √(b2 - 4ac)) / 2a
where:
a = 1
b = 20
c = -63.025
Plug in these values into the formula. You should get two solutions because of the plus/minus sign. Accept the positive value of r.
Please mark brainliest
<em><u>Hope this helps.</u></em>
Answer:
88
Step-by-step explanation:
10.2 × (2 × 3.7) + 8
≈ 10 × (2 × 4) + 8
= 10 × 8 + 8
= 80 + 8
= 88
Answer:
Step-by-step explanation:
well i don't know what this means because it says which so that means there has to be a multiply choice. so i cant really help with that
Answer:
There are 27 boxes are on the shelf at the start of the day.
Step-by-step explanation:
Let number of boxes are on the shelf at the start of the day is x
According to given situations :
On one day, a store sold 16 boxes of rice
i.e, 
Restocked the shelf with 22 boxes,
⇒ 
But 27 boxes sold
⇒ 
Restocked with 30 boxes,
⇒ 
But 15 boxes sold,
⇒ 
There are now 21 boxes of rice on the shelf.
So, 
Therefore,There are 27 boxes are on the shelf at the start of the day.
