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s344n2d4d5 [400]
3 years ago
8

Number Sense : Would the answer to 20 x 500 have three zeros or four zeros? EXPLAIN.

Mathematics
2 answers:
Sloan [31]3 years ago
8 0
20=2*10
500=5*10*10

20*500=
2*10*5*10*10=
2*5*10*10*10=
10*10*10*10=
10000
4 zeroes
vazorg [7]3 years ago
8 0
500 * 20= <span>10000
So they would have 4 zeros.
-thepopularoneha
</span>
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5.38516480713

Step-by-step explanation:

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How to solve -x+4=-2x-6
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Add 2x to both sides 

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The answer I neeed it now
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Anser is B). Subtract smallest number
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3 years ago
Please Help. I really don’t get this concept, if you could explain it in detail it would be very appreciated
Dafna11 [192]
<h3>Answer: 24/25</h3>

=================================================

Explanation:

Sine is given to be negative, and so is tangent. This only happens in quadrant Q4

Recall that y = sin(theta), so if sin(theta) < 0, then we're below the x axis.

If tan(theta) < 0, then this means cos(theta) > 0

So we have y < 0 and x > 0 which places the angle somewhere in Q4.

--------------------------

Draw a right triangle as shown below in the attached image. We have AC = 25 and BC = 7. Use the pythagorean theorem to find that AB = 24

So this is what your steps may look like

a^2+b^2 = c^2

7^2+b^2 = 25^2

b^2+49 = 625

b^2 = 625-49

b^2 = 576

b = sqrt(576)

b = 24

So because AB = 24, we know that the cosine of the angle is adjacent/hypotenuse = 24/25

---------------------------

As an alternative, you could use the trig identity

sin^2(x) + cos^2(x) = 1

and plug in the given value of sine to solve for cosine. The cosine value result will be positive since we're in Q4.

So,

sin^2(x) + cos^2(x) = 1

(-7/25)^2 + cos^2(x) = 1

(49/625) + cos^2(x) = 1

cos^2(x) = 1 - (49/625)

cos^2(x) = (625/625) - (49/625)

cos^2(x) = (625-49)/625

cos^2(x) = 576/625

cos(x) = sqrt(576/625)

cos(x) = sqrt(576)/sqrt(625)

cos(x) = 24/25

This is effectively a rephrasing of the previous section since the pythagorean trig identity is more or less the pythagorean theorem (just in a trig form)

6 0
3 years ago
EXPERT HELP I'LL GIVE BRAINLIEST: C or D
denis23 [38]

Answer:

Step-by-step explanation:

A=(3.14d^2)/4

A=0.785d^2

A=0.785(10^2)

A=78.5 yd^2

6 0
3 years ago
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