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2 years ago

8

Explain how you could estimate 35% of 58, check if your answer is reasonable.

2 answers:

Greeley [361]2 years ago

6 0

Answer:

.35 x 58 = 20.3

Step-by-step explanation:

mars1129 [50]2 years ago

4 0

Answer:

estimate answer is 21% and real answer is 20.3%

yes it is reasonable because its around the real answer.

Step-by-step explanation:

for example, in a division problem like 424 ÷ 4 − 10, we can check is our answer is reasonable or not, by estimating an approximate answer or by plugging in using the division formula. we can round down 424 to the nearest hundreds, to estimate the answer. Since 96 (actual answer) ≈ 90 (estimate answer), we know our solution is correct.

so round 58 to the nearest ten which is 60

35% of 60

35/100= 7/20

60/20=3

3x7= 21

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Step-by-step explanation:

5 0

3 years ago

1. Use the formula S(d)=√9.8d to calculate the estimated speed, in meters per second, of a tsunami if the disturbance occurred a

postnew [5]

Answer: 1. 210 meters per second .

2. 756 kilometers per hour.

Step-by-step explanation:

Given : The formula $S(d)=\sqrt{9.8d}$ to calculate the estimated speed, in meters per second of a tsunami.

1. If the disturbance occurred at an ocean depth of 4,500 meters.

Then put d= 4500 in the above formula , we get

$S(d)=\sqrt{9.8\times4500}$

$S(d)=\sqrt{44100}=\sqrt{21\times21\times10\times10}\\\\=\sqrt{210^2}=210$

Hence, if the disturbance occurred at an ocean depth of 4,500 meters , the estimated speed would be 210 meters per second .

Also, A meter per second is equal to 3.6 kilometers per hour.

i.e. 1 meter per second = 3.6 kilometers per hour

Then by unitary method ,

210 meters per second = $3.6\times210$ kilometers per hour

=756 kilometers per hour.

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3 years ago