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3 years ago

How do I solve this question?

Mathematics

2 answers:

Elena L [17]3 years ago

4 0

Answer:

Step-by-step explanation:

should be the correct answer

love history [14]3 years ago

3 0

Answer:

160 large blocks

Step-by-step explanation:

25 small blocks --- 40 large blocks

100 small blocks --- x large blocks

Making a proportion,

25/100 = 40/x

Cross multiplying,

25x = 4000

Dividing by 25 on both sides,

x = 160 large blocks

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Explanation about Cardinal number Carolyn relation cardinals

nalin [4]

Answer:

Cardinal Numbers

The cardinality of a group represents the number of objects available in that group.

The number of elements or members in a set is the cardinal number of that set. ...

For example, set A = {1, 3, 6, 9, 10, 12, 18}, the cardinal number of set A is 7.

Step-by-step explanation:

i don't no kung true hehe

7 0

3 years ago

Min knows that Pi times r = 9.42 centimeters. What would she need to do to find the area?

Alinara [238K]

Answer:

The area of the circle is 28.26.

Step-by-step explanation:

πr =9.42

Using that, we can find the radius, which will help us find the area of the circle.

9.42/π = 3 (I used 3.14 for π)

The formula for area of a circle is:

πr^2

Plug our values in.

π(3^2)

9π

28.26

The area of the circle is 28.26.

To sum, Min would need to first figure out the radius of the circle, and then use the radius to find the area of the circle. She can figure out the radius by dividing 9.42 by π, and find the area with the formula πr^2.

5 0

3 years ago

Read 2 more answers

A trough of water is 20 meters in length and its ends are in the shape of an isosceles triangle whose width is 7 meters and heig

Vaselesa [24]

Answer:

a) Depth changing rate of change is $0.24m/min$ , When the water is 6 meters deep

b) The width of the top of the water is changing at a rate of $0.17m/min$ , When the water is 6 meters deep

Step-by-step explanation:

As we can see in the attachment part II, there are similar triangles, so we have the following relation between them $\frac{3.5}{10} =\frac{a}{h}$ , then $a=0.35h$ .

a) As we have that volume is $V=\frac{1}{2} 2ahL=ahL$ , then $V=(0.35h^{2})L$ , so we can derivate it $\frac{dV}{dt}=2(0.35h)L\frac{dh}{dt}$ due to the chain rule, then we clean this expression for $\frac{dh}{dt}=\frac{1}{0.7hL}\frac{dV}{dt}$ and compute with the knowns $\frac{dh}{dt}=\frac{1}{0.7(6m)(20m)}2m^{3}/min=0.24m/min$ , is the depth changing rate of change when the water is 6 meters deep.

b) As the width of the top is $2a=0.7h$ , we can derivate it and obtain $\frac{da}{dt}=0.7\frac{dh}{dt} =0.7*0.24m/min=0.17m/min$ The width of the top of the water is changing, When the water is 6 meters deep at this rate