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Likurg_2 [28]
3 years ago
9

What is 218.4 rounded to the nearest whole number

Mathematics
2 answers:
natali 33 [55]3 years ago
7 0

Answer:

218

Step-by-step explanation:

The closest hole number is 218 because if you were to look on a number line, you would see that 218.4 is closer to 218 and not 219, or any other whole number.

Hope this helped!! :)

Stay safe and have a wonderful day/night!!!!!

Brainliest?!?!

kati45 [8]3 years ago
5 0

Answer:

It's 218, since 4 rounds below 5.

Step-by-step explanation: Please brainliest!

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A spherical iron ball 10 in. in diameter is coated with a layer of ice of uniform thickness. If the ice melts at a rate of 15 St
seraphim [82]

Answer:

a) Rate at which the thickness of the ice is decreasing, da/dt = -0.024 in/min

b) Rate at which the outer surface area is decreasing, dA/da = -4.22 in²/min

Step-by-step explanation:

The volume of the sphere, V = 4/3 πr³

The thickness of the ice = a

inner diameter = 10  in

inner radius = 10/2 = 5 in

outer radius = 5 + a

Therefore, volume of ice = volume of the outer radius - volume of the inner radius

V = 4/3 π (4+a)³ - 4/3 π4³

V = 4/3 π ( 4³ + 12a² + 48a + a³ -4³)

V = 4/3 π(a³ + 12a² + 48a)

dV/dt = 4/3 π (3a²da/dt + 24ada/dt + 48da/dt)

dV/dt = 4π(a²da/dt + 8ada/dt + 16da/dt)..............(1)

When a = 3 in, dV/dt = -15 m³/min

Substitute these values into equation (1)

-15 = 4π(9da/dt + 24 da/dt + 16da/dt)

-15/4π = 49da/dt

-1.194 = 49da/dt

da/dt = -1.194/49

da/dt = -0.024 in/min

b) How fast is the outer surface area of ice decreasing

The area of a sphere, A = 4πr²

The outer surface area of the sphere, A = 4π(4+a)²

dA/da = 8π (4+a) da/dt

a = 3 in, da/dt = -0.024 in/min

dA/da = 8π(4+3)*(-0.024)

dA/da = -4.22 in²/min

8 0
3 years ago
Marco and his two younger sisters would like to purchase a silver charm bracelet for their mother’s birthday. they went to the m
ioda

Function would be f(x) = 5x+85

here, x= 15

5(15)+85 = 75+85 = $160

8 0
3 years ago
You are standing 40 meters from the base of a tree that leans 8o away from you. The angle of elevation from you to the top of th
Y_Kistochka [10]

Answer:

the height of the tree is <em>15.49 m</em>

<em></em>

Step-by-step explanation:

Step 1:

From the figure, we can determine ∠ATB by using the fact that the sum of all the angles in a triangle add up to 180°:

∠ ATB  = 180° - 98° - 20°

∠ ATB = 62°

Step 2:

Therefore, using the law of sines, we can determine the height of the tree.

TB / sin(20°)  = 40 / sin(62°)

TB = 40 × (sin(20°) / sin(62°))

<em>TB = 15.49 m </em>

<em></em>

Therefore, the height of the tree is <em>15.49 m</em>

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3 years ago
In the table below, the number of pounds of blueberries is proportional to the number of pounds of strawberries
Scilla [17]

Answer:

b i think

Step-by-step explanation:

because even i didnt see it i still remember my old lessons

#CarryOnLearning

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3 years ago
What is the slope of the line x=6
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undefined

Step-by-step explanation:

Vertical lines never have a defined slope as you can never divide a number by zero

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3 years ago
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