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3 years ago

How many tiles of 20cm by 20cm are needed for a dinning room measuring 20m?

1 answer:

6 0

To find the area of the dining room, take 20m x 20m=400m
The area of each tile is 20cm x 20cm=40cm.
Convert the are of the dining room to cm which is 400 x 100= 40000cm
The divide the area of the dining room by the are of the tiles to find how m,any tiles are needed.
Which is 40000cm/40cm= 1000 tiles

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Convert the following values into scientific notation. Which one has the negative exponent.

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Answer:

B has a negative exponent: 8 x 10^-7

A doesn't: 4.267 x 10^7

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3 years ago

Object A has 50 kg while Object B has 75 kg. They were pushed with the same amount of force. Which will have greater acceleratio

raketka [301]

Answer:

Object A will have greater acceleration.

Step-by-step explanation:

Given that,

The mass of object A = 50 kg

The mass of object B = 75 kg

They were pushed with the same amount of force.

We know that, the force acting on an object is given by :

F = ma

Here F is same for both mass

$m_1a_1=m_2a_2$

Mass and acceleration have inverse relation. It means the object whose mass is less will have greater acceleration. Hence, the acceleration is greater for object A.

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3 years ago

An observer stands 25 feet from the base of a flagpole and watches a flag being lowered at a rate of 5 ft/sec. Determine the rat

Sedaia [141]

Answer:

0.1 rad/s

Step-by-step explanation:

Since the distance from or to the flagpole is not given, I will assume. And my assumption is 50 ft

Now, the elevation angle A = 45 degrees, converting to radians, we have π/4 radians

Remember that the tan of an angle is OPP/HYP, and so

tan A = h/25, on differentiating, we have

d tan A/dA = sec^2 A = (1/25) dh/dA

Next, we have

25 sec^2 A * dA/dt= dh/dt = 5

Making dA/dt the subject of formula, we have

dA/dt = (1/5) cos^2 A

but cos^2 A from trigonometry = 1/2, this means that

dA/dt = .1 radians/second

If you want to convert to degrees, your have

.1 Rad/s( 180 deg/rad) = 18 degrees/second

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3 years ago

Eunice buys dog bed with a listed price of $31. Eunice uses a sale that provides 30% off. What is the total

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Answer:

21.70

Step-by-step explanation:

First find the discount

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9.3

Subtract from the original amount

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21.70

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3 years ago

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Answer:

0 and 10 for this if im wrong sorry.

Step-by-step explanation:

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3 years ago

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