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4 years ago

How much is 2 + 2 .do not use the calculator

Mathematics

2 answers:

aleksandrvk [35]4 years ago

7 0

The answer to this question is 4!

sasho [114]4 years ago

4 0

Its obviously 4 lol....

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Write an inequality to represent 11 and 20

Effectus [21]

We can use the less than symbol which I have shown on the whiteboard.

Ignore the first example on the top right as that's another example.

So, we can say that 11 < 20 or 11 is less than 20.

7 0

3 years ago

Which of these figures has rotational symmetry?

Karo-lina-s [1.5K]

The answer is B,D

EXP:cause I had it on my computer

6 0

3 years ago

You spent 14 of your allowance on Monday. On Tuesday, you spent 13 of what was left. On Wednesday, you spent 12 of what remains.

Alex787 [66]

A = allowance
(1/2)a = what have left after Monday
(1/2(1/2)a = what you have after Tuesday
(1/2)(1/2)(1/2)a = what you have after Wednesday.

Doing the multiplication.

(1/8)a = what you have left.

You have 1/8 of what you had at the start.

5 0

2 years ago

What is Three-fourths divided by one-half? A fraction bar labeled 1. Under the 1 are 4 boxes containing one-fourth. Under the 4

Feliz [49]

Answer: Three-fourths divided by one-half is one and a half.

Step-by-step explanation:

Here we need to find, Three-fourths divided by one-half.

i.e. To find : $\dfrac 34 \div \dfrac 12$

Since , $\dfrac{a}{b}\div\dfrac{c}{d}= \dfrac{a}{b}\times\dfrac{d}{c}$

So, $\dfrac 34 \div \dfrac 12=\dfrac{3}4\times\dfrac{2}1$

$=\dfrac{3}{2}\times\dfrac11$ [Cancel 4 by 2 and it remains as 2.]

$=\dfrac{3}{2}=1\dfrac{1}{2}$

Hence, Three-fourths divided by one-half is one and a half.

6 0

3 years ago

A grain silo is a cylinder with a hemisphere on top. In the Happy Farms grain silo, the height of the cylindrical portion is 30

ElenaW [278]

Answer:

1) The volume of a hemisphere of radius R is equal to half the volume of a sphere of radius R.

Where the volume of a sphere of radius R is:

V = (4/3)*pi*R^3

In this case, the radius is R = 10ft

And pi = 3.14

2) Now we can just solve that equation to get:

V = (1/2)*(4/3)*3.14*(10ft)^3 = 2,093.33 ft^3

Where the (1/2) comes because the volume of the hemisphere is half the volume of a complete sphere, as we already said above.

4) We know that the volume of a cylinder is:

V = pi*(r^2)*h

where:

pi = 3.14

r represents the radius. The radius of the cylinder will be the same as the radius of the hemisphere, then r = 10ft

h is the height of the cylinder, in this case, h = 30ft

Then the volume is:

V = 3.14*(10ft)^2*(30ft) = 9,420 ft^3

The total volume is equal to the sum between the volumes of the cylinder and the volume of the hemisphere.

Then the total volume is:

Volume = 9,420 ft^3 + 2,093.33 ft^3 = 11,513.33 ft^3

5 0

3 years ago

Read 2 more answers