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ivann1987 [24]
3 years ago
15

Please help. Thank you all

Mathematics
1 answer:
Marina86 [1]3 years ago
4 0
<h3>Answer:  14 square inches</h3>

Explanation:

There are 4 lateral faces for each of the three blocks. So that is 4*3 = 12 faces so far. Then there is the top and bottom face of the top and bottom block respectively. This brings the total up to 12+2 = 14 external faces.

Alternatively, we can note how 1 cube has 6 faces. So 3 cubes have 3*6 = 18 faces. However, 4 faces are hidden or they are not external faces when we combine the blocks as the diagram shows. So we have 18-4 = 14 external faces.

No matter which method you use, there are 14 external faces. Each face is 1*1 = 1 square inch, so the total surface area is 14*1 = 14 square inches.

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ss7ja [257]

Answer:

according to writer it answer is 2 minute

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3 years ago
A cube has edges measuring 9 inches each find the volume
LUCKY_DIMON [66]
The formula for the volume of a cube is s^{3}, where s is the side length. Then, just do 9 to the third power, or 9*9*9, which equals 729.
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4 years ago
A bottle rocket is shot off a bridge into the stream below. The height of the rocket (in feet) above
nalin [4]

The correct model of the height of rocket above water is;

h(t) = -16t² + 96t + 112

Answer:

time to reach max height = 3 seconds

h_max = 256 ft

Time to hit the water = 7 seconds

Step-by-step explanation:

We are given height of water above rocket;

h(t) = -16t² + 96t + 112

From labeling quadratic equations, we know that from the equation given, we have;

a = -16 and b = 96 and c = 112

To find the time to reach maximum height, we will use the vertex formula which is; -b/2a

t_max = -96/(2 × -16)

t_max = 3 seconds

Thus, maximum height will be at t = 3 secs

Thus;

h_max = h(3) = -16(3)² + 96(3) + 112

h_max = -144 + 288 + 112

h_max = 256 ft

Time for it to hit the water means that height is zero.

Thus;

-16t² + 96t + 112 = 0

From online quadratic formula, we have;

t = 7 seconds

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Which of the following sets of measurements can form exactly 1 triangle..1)a=12,b=27, A=37 degrees..2)a=11,b=15,A=36 degrees.3)a
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Answer:

1

Step-by-step explanation:

you grab to different angles and add them up, they have to be greater than the last angle. you must check all different combinations

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