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Radda [10]
2 years ago
5

What keywords tell you when to multiply, or divide in word problems

Mathematics
2 answers:
Assoli18 [71]2 years ago
4 0

Answer:

for multiplication

  1. of.

Step-by-step explanation:

for division

  1. divided by
  2. quotient of
  3. out of
  4. ratio of
ad-work [718]2 years ago
4 0

Answer:

The key word that designates multiplication or division is "each".

Step-by-step explanation:

"Each" indicates that the groups being combined or split up need to be equal in size. Other words like "total", "area", "in all", and "altogether" can designate multiplication or

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marusya05 [52]
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2 years ago
A projectile is fired with muzzle speed 250 m/s and an angle of elevation 45° from a position 30 m above ground level. Where doe
qaws [65]

The projectile's horizontal and vertical positions at time t are given by

x=\left(250\dfrac{\rm m}{\rm s}\right)\cos45^\circ\,t

y=30\,\mathrm m+\left(250\dfrac{\rm m}{\rm s}\right)\sin45^\circ\,t-\dfrac g2t^2

where g=9.8\dfrac{\rm m}{\mathrm s^2}. Solve y=0 for the time t it takes for the projectile to reach the ground:

30+\dfrac{250}{\sqrt2}t-4.9t^2=0\implies t\approx36.2458\,\mathrm s

In this time, the projectile will have traveled horizontally a distance of

x=\dfrac{250\frac{\rm m}{\rm s}}{\sqrt2}(36.2458\,\mathrm s)\approx6400\,\mathrm m

The projectile's horizontal and vertical velocities are given by

v_x=\left(250\dfrac{\rm m}{\rm s}\right)\cos45^\circ

v_y=\left(250\dfrac{\rm m}{\rm s}\right)\sin45^\circ-gt

At the time the projectile hits the ground, its velocity vector has horizontal component approx. 176.77 m/s and vertical component approx. -178.43 m/s, which corresponds to a speed of about \sqrt{176.77^2+(-178.43)^2}\dfrac{\rm m}{\rm s}\approx250\dfrac{\rm m}{\rm s}.

7 0
3 years ago
How many times will the digit '3' appear if we write all whole numbers from 1 to 99?
SSSSS [86.1K]

Answer:

20 times

Step-by-step explanation:

Here is a chart:

3,13,23,30,31,32,33,34,35,36,37,38,39,43,53,63,73,83,93.

It appears 20 times. Hope this helps!

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saul85 [17]

Answer:

I could try.

Step-by-step explanation:

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3 years ago
Use distributive property to simplify (0.32x+5.3)+(0.5x+5.6)+(0.03x+0.2)
Serhud [2]

the answer is

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3 years ago
Read 2 more answers
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