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VARVARA [1.3K]
2 years ago
9

Can someone please help me fill out this table

Mathematics
1 answer:
Amiraneli [1.4K]2 years ago
4 0

I thought I saw this one earlier and there were people answering.  Guess not.

h(t) = 5 + 98t - 4.9t²

h(0) = 5 meters

h(5) = 5 + 98(5) - 4.9(5)² = 372.5 meters

h(10) = 5 + 98(10) - 4.9(10)² = 5 + 980 - 490 = 495 meters

h(15) = 5 + 98(15) - 4.9(15²) = 372.5 meters

h(20) = 5 meters

I'll leave the graphing to you, plot those points

(0,5), (5,372,5),(10,495),(15,372.5) (20,5)

and connect the dots

It's coming down pretty fast at 5 feet up 20 seconds.  That last bit is 5/495 or 1% of the trip, so probably double the average speed of around 50m/s so 100msec or .05 sec to go 5 meters.

So it's in the ground at about 20.05 seconds after launch.

Answer: 20.05 meters

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3 years ago
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Find the area of a triangle with a =33, b =51, and c =42.
PolarNik [594]

Answer:

d. 690.1 units²

Step-by-step explanation:

1. You can use the Heron's formula to calculate the area of the triangle, which is:

K=\sqrt{s(s-a)(s-b)(s-c)}

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3. Substitute values into the formula shown above and calculate the area, as following:

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4 0
3 years ago
Factorise 2x^2 - 3x -2 < 0
Galina-37 [17]
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2. <span>Ask: Which two numbers add up to -3 and multiply to -4?
</span>3. <span>Answer: 1 and -4
</span>4. Rewrite -3x as the sum of x and -4x

2 x^{2} +x-4x-2\ \textless \ 0


Step 2: <span>Factor out common terms in the first two terms, then in the last two terms.

</span>x(2x+1)-2(2x+1)\ \textless \ 0
<span>
Step 3: </span>Factor out the common term 2x+1

(2x+1)(x-2)\ \textless \ 0

Step 4: Solve for x

1. Ask: When will (2x+1)(x-2) equal zero?
2. Answer: When 2x + 1 = 0 or x-2=0
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</span>x=- \frac{1}{2} ,2
<span>
Step 5: </span>From the values of x <span>above, we have these 3 intervals to test.
x = < -1/2
-1/2 < x < 2
x > 2

Step 6: P</span><span>ick a test point for each interval

</span>For the interval x\ \textless \ - \frac{1}{2} &#10;
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<span>
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Lets pick x=0. Then, 2* 0^{2} - 3 * 0-2\ \textless \ 0. After simplifying, we get -2\ \textless \ 0, which is true. Keep this <span>interval.

For the interval </span>x\ \textgreater \ 2

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.Step 7: Therefore, 
- \frac{1}{2} \ \textless \ x\ \textless \ 2

Done! :)</span>
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