The percent that 688 is to 2150 is 32.
To get your answer, you will divide 688 into 2150.
The Surface area of the whole cone is 4408.56 cm²
The Surface area of the tips that is removed is 376.8 cm²
The Surface area of the megaphone(hollow) is 2712.96 cm²
<h3 /><h3>What is surface area?</h3>
Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape.
Therefore,
Surface area of the whole cone = πr² + πrl
Therefore,
Surface area of the whole cone = πr(r + l)
where
- r = radius = 18 cm
- l = edge length = 60 cm
Surface area of the whole cone = 3.14 × 18(18 + 60) = 4408.56 cm²
Surface area of the tips that is removed = 3.14 × 4 (18 + 12) = 376.8 cm²
Surface area of the megaphone(hollow) = πrl
Surface area of the megaphone(hollow) = 3.14 × 18 × (60 - 12) = 2712.96 cm²
learn more on surface area here: brainly.com/question/7410402
Answer:
i dont know the other answers but the earth takes 4 mins to turn a degree so you multiply 310 by four then divide your answer by 60 to convert the answer from minutes to hours
If you want to solve the system of equations it will be:
Step 1: solve the equation for y
y= -19+7 → y= -12
Step 2: substitute y into the equation
-2x+3x(-12)=-19
Step 3: solve the equation for x
x= -17/2
Step 5: the possible solution is the order pair (x,y)
Answer: (-17/2 , -12)
Using the required arithmetic operations, the number of mowing hours required to meet up with the cost of the Havannian ls 7 hours.
- <em>Cost of Havannian = Php 299</em>
- <em>Amount saved = Php 42 </em>
<u>The amount he'll be given by his parent</u>s = 3(42) = Php 126
<em>Total amount</em> = 42 + 126 = Php 168
Amount left to meet up cost of Havannian = (299 - 168) = Php 131
<u>Lawn cutting rate per hour = Php 20</u>
Number of cutting hours needed = (Php 131 ÷ Php 20) = 6.55 hours
Therefore, in other to meet up with the cost of the Havannian, hell have to mow for atleast 7 hours.
Learn more : brainly.com/question/18112348