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3 years ago

HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP

Mathematics

2 answers:

Helen [10]3 years ago

3 0

Answer:

7 seconds

Step-by-step explanation:

Hello There!

I had created a graph to make it easier to understand

So when y = 0 is when the ball is at the ground

when y = 0 x = 7 so it took about 7 seconds for the ball to hit the ground

Lady bird [3.3K]3 years ago

3 0

Answer:

Step-by-step explanation:

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Need help please help

aleksandrvk [35]

okokok

Step-by-step explanation:

5 0

3 years ago

Brooklyn has sold 70% of the 20 candy bars she is supposed to sell for her basketball team. How many candy bars did she sell alr

romanna [79]

Answer:

14 candy Bars

Step-by-step explanation:

Let's under the question before we attempt it.

Total number of Candy Brooklyn is supposed to sell = 20

Percentage of Candy Bars sold= 70%

To know the exact number of Candy sold, it's means we must know the exact value of 70% of 20.

To solve this, we just proceed with mathematical operations.

Therefore:

70% of 20

= 70 / 100 * 20

= 1400 / 100

= 14.

It therefore means that, Brooklyn sold 14 Candy Bars

Math is fun! Lets Keep learning

7 0

3 years ago

Let C = C1 + C2 where C1 is the quarter circle x^2+y^2=4, z=0,from (0,2,0) to (2,0,0), and where C2 is the line segment from (2,

trapecia [35]

Not much can be done without knowing what $\mathbf F(x,y,z)$ is, but at the least we can set up the integral.

First parameterize the pieces of the contour:

$C_1:\mathbf r_1(t_1)=(2\sin t_1,2\cos t_1,0)$
$C_2:\mathbf r_2(t_2)=(1-t_2)(2,0,0)+t_2(3,3,3)=(2+t_2, 3t_2, 3t_2)$

where $0\le t_1\le\dfrac\pi2$ and $0\le t_2\le1$ . You have

$\mathrm d\mathbf r_1=(2\cos t_1,-2\sin t_1,0)\,\mathrm dt_1$
$\mathrm d\mathbf r_2=(1,3,3)\,\mathrm dt_2$

and so the work is given by the integral

$\displaystyle\int_C\mathbf F(x,y,z)\cdot\mathrm d\mathbf r$
$=\displaystyle\int_0^{\pi/2}\mathbf F(2\sin t_1,2\cos t_1,0)\cdot(2\cos t_1,-2\sin t_1,0)\,\mathrm dt_1$
${}\displaystyle\,\,\,\,\,\,\,\,+\int_0^1\mathbf F(2+t_2,3t_2,3t_2)\cdot(1,3,3)\,\mathrm dt_2$