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ANEK [815]
3 years ago
14

Please help ASAP due in 10 minutes!!!

Mathematics
2 answers:
4vir4ik [10]3 years ago
5 0

Answer:

B

Step-by-step explanation:

3 power of 4 equal to 81

3 power of 2 equal to 9

81/9 = 9

serious [3.7K]3 years ago
3 0

Answer: B. 9

Step-by-step explanation: To convert 3 to the 4th power/ 3 to the second power, then you’ll have to figure out the whole number form of both integers. Next, you‘ll have to divide both whole numbers (81 & 9). 81 ÷ 9 =  9. So, your final answer should be B. 9.

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To test the impact performance of a 10 cm thick gymnastics mat, a 20 kg cylindrical
denis23 [38]

Answer:

A)196J

B)-208J

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Step-by-step explanation:

We are given that a 20 kg cylindrical  mass is dropped onto the mat from a height of 1 m above the mat. During the impact,  the cylinder’s vertical velocity reaches zero at the instant the mat has compressed to  only 4 cm thick.

So, The Mat gets compressed by : 10cm - 4 cm = 6 cm=0.06 m

a)

Using Conservations of energy

Potential energy at the top = Kinetic energy at the point before touching the surface

Kinetic energy = mgh= 20 \times 9.8 \times 1 = 196 J

b)

Work done  by the mat do to stop the fall of the cylinder =-mg(h+0.06)=-20 \times 9.8(1+0.06)=-208 J

C)

Work done=\text{Average force} \times \text{ Compression of mat}

208=F \times 0.06

F=3467J

8 0
3 years ago
What’s the answer helpp
padilas [110]
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8 0
3 years ago
9. If two complementary angles are in the<br>ratio 3:7, find the supplement of the<br>bigger angle.​
ddd [48]

Answer:

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Step-by-step explanation:

6 0
3 years ago
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Dimas [21]

Answer:

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Step-by-step explanation:

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