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Luba_88 [7]
2 years ago
13

Suppose you know the area of the yard is 7,500 square feet. How can you find the value of a?

Mathematics
1 answer:
tia_tia [17]2 years ago
8 0

Answer:

a = 50

Step-by-step explanation:

From the introduction, you know that the area is 3a^2

You also know that it is 7500 square feet. \

So the two must be equal

3a^2 = 7500                    Divide by 3

a^2 = 7500/3

a^2 = 2500

The square root of 2500 is 50

sqrt(a^2) = sqrt(2500)

a = 50

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maria [59]

The reaction force exerted by the floor of the elevator on the man is D.944 N

Step-by-step explanation:

When the elevator is accelerating upwards at 2 m/s² there occurs a fictitious force acting downwards to produce a downward acceleration of 2 m/s².

The formula to apply here is ;

Weight due to gravity=mg where m is mass of the man and g is acceleration due to gravity.

Due to additional downward acceleration the total acceleration downwards will be : 9.8+2 = 11.8 m/s²

The man weighs down on the elevator floor with a force of ;

F=m(a+g) where m is mass of man, a is acceleration

F=80( 9.8+2)

F=80(11.8)= 944 N

The reaction force by the floor of the elevator is thus 944 N

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Elevator physics :brainly.com/question/13464055

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3 0
3 years ago
Divide $200 in the ratio 3:2
N76 [4]

Answer:

120:80 I think this is the answer

Step-by-step explanation:

200 \div 5 = 40

40 = 1 \: ratio

3 \times 40 = 120

2 \times 40 = 80

4 0
3 years ago
Cynthia ran 4 laps in 40 min.   What is the rate of number of laps to minutes?
fomenos
1 lap to ten minutes or 1:10 due to the fact that it takes ten minutes to run one lap. hope this helps, have a nice day :)
7 0
3 years ago
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puteri [66]

Answer:

5

Step-by-step explanation:

40÷[20-4*(7-4)]

Start with the inner most parentheses

40÷[20-4*(3)]

Then the brackets, multiply first

40÷[20-12]

Then subtract

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5

6 0
3 years ago
What is the nearest ten thousand of 85,001
Kipish [7]
The answer is 90,000. Just remember 5 or above, give it a shove, and for or below let it go. Because 85 has a five at the end you push it up to 90. Same thing with 85,000 or 85,001. You shove it to 90. If it was 84,000 or 84,999 you would let it go to 80,000. Hope that helped!
6 0
2 years ago
Read 2 more answers
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