3 years ago

How to estimate 586-321 two different ways

1 answer:

6 0

You can either do it to the nearest ten or the nearest hundred

(nearest ten) 590 - 320 = 270

(nearest hundred) 600 - 300 = 300

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Allison has five times as many baseball cards as football cards and all she has 120 baseball and football cards how many basebal

Shtirlitz [24]

The answer is 600 because you have to multiply 120 by 5 and the sum is 600

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3 years ago

Justin rode his bicycle 5.3 miles a day for 17 days straight. How many miles did Justin ride altogether during the 17-day stretc

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The answer is B. 5.3 miles per day * 17 days = 90.1 total miles.

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3 years ago

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You read 9.75 pages in your science book and 24.5 pages of a play for English class. It takes you 1.2 minutes to read each page

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9.75 * 1.2 = 11.7
24.5 * .8 = 19.6

11.7+19.6= 31.3 minutes

hope this helped :)

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2 years ago

4. Earth is in thermal equilibrium. This means that our planet is radiating away exactly as much energy as it is receiving from

lana [24]

Answer:

5.099*10^14 m^2

Step-by-step explanation:

Earth is in thermal equilibrium. This means that our planet is radiating away exactly as much energy as it is receiving from the Sun. This "re-radiation" from the Earth is not visible because it its peak wavelength is in the infrared part of the spectrum. Even the coldest parts of the Earth are way above absolute zero, so every square meter of Earth’s surface is radiating this energy out to space. Using the same radius given in step 2 above, and the formula for the area of a sphere, calculate the surface area of the Earth.

(The radius of the Earth is 6,370,000 meters.)

The earth is spherical in shape , so we use the formula for finding the surface area of a sphere

Surface Area= $4\pi r^{2}$

S.A=4*3.14*6,370,000^2

S.A=4*pi*40576900000000

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Man occupies about one-eighth of the earth.

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3 years ago

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What does | 3+i | equal

prohojiy [21]

The straight lines are asking to find the modulus or the size of the complex number.
For a complex number z = x + iy, [z] = √(x^2 +y^2)
Where x = Real Number, y = Imaginary number.
For 3 +i, x = 3, y = 1 (Note y is what number that is attached to i)

[3 + i] = √(3^2 +1^2) = √10 = 3.162

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3 years ago