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3 years ago

10

Find the area of the shaded polygons

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Dimas [21]3 years ago

6 0

I think u forgot to add a picture

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MAY DAY MAY DAY, HELP

Pavlova-9 [17]

Have you heard the expressions "shooting fish in a barrel" or
"taking candy from a baby" ?

I've decided to take your points and try not to feel guilty about it.

A). That's it ! That's the equation, for ANY basketball on Earth.
You wrote it right there in your question.

In that equation that you wrote, the ' r ' is the initial velocity.
You said that Adam tossed it straight up, and it was going 10 meters per second
   when it left his hand.
So ' r ' in the equation is +10.
The equation is:
   <em>d = 10t - 5t² </em> .
It tells you how high the ball is above its tossing height after any number of seconds.
The ' t ' in the equation is the number of seconds. Any letter could have been used,
but ' t ' was cleverly selected because it stands for 'time'.

B). You want to know where it is after 0.5 second ? All you have to do is put '0.5'
into the equation wherever there's a ' t '. Do you really need somebody to do that
for you ?

Well, OK. You're being so overly generous with your points . . .

   Distance = 10 t - 5 t²

   Distance = 10 (0.5) - 5 (0.5)²

   Distance = 5 - 5(0.25)

   Distance = 5 - 1.25

   <em>Distance =    3.75 meters </em>

<u>positive</u> 3.75 means <u>above</u> Adam's hand.

A thinking exercise:
-- He tossed the ball upwards at 10 meters per second.
-- Why is it not 5 meters above his hands after 0.5 second?

7 0

3 years ago

The distance, in feet, a stone drops in tt seconds is given by d(t)=16t2d(t)=16t2. The depth of a hole is to be approximated by

Verizon [17]

Define the distance through the equation

$x=16t^2$

The distance against the time is given by

$\Delta x = 32 t \Delta t$

$\Delta t = \frac{2}{10}s$

When t=2s,

$\Delta x = 32(2)\frac{2}{10}$

$\Delta x = 12.8$

There is a error in 12.8feet.

b) When t=5sec

$\Delta x= 32t\Delta t$

$\Delta x= 32(5)*\frac{2}{10}$

$\Delta x = 32$

There is a error in 32 feet.

5 0

3 years ago

Which expression is equivalent to 2(3x – 8)?

miv72 [106K]

<em>Hope</em><em> </em><em>this</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em>

8 0

3 years ago

Read 2 more answers

An article reported the following data on oxygen consumption (mL/kg/min) for a sample of ten firefighters performing a fire-supp

nasty-shy [4]

Answer:

a) Range = 25.6

b) Variance = 48.1446

c) s = 6.9386

d) See below

Step-by-step explanation:

(a) the sample range

To obtain the sample range, we must <em>sort the data increasingly</em> :

23.7, 26.3, 28.3, 28.7, 29.6, 29.8, 30.1, 31, 33.5, 49.3

Then, find the <em>distance between the largest and the lowest </em>

Range = 49.3 - 23.7 = 25.6

(b) the sample variance $s^2$ from the definition

In order to find the variance from the definition, we need first the mean. The mean is defined as the average

$\bar x=\displaystyle\frac{\displaystyle\sum_{i=1}^{n}x_i}{n}$

where the $x_i$ are the values of the data collected and <em>n=10</em> the size of the sample.

So, <em>the mean</em> is

$\bar x=31.03$

Now, t<em>he variance of the sample </em>is defined as

$s^2=\displaystyle\frac{\displaystyle\sum_{i=1}^n(x_i-\bar x)^2}{n-1}$

and we have that <em>the variance</em> is

$s^2=48.1446$

(c) the sample standard deviation

The sample standard deviation is nothing but the <em>square root of the variance </em>

$s=\sqrt{48.1446}=6.9386$

d) $s^2$ using the shortcut method

The <em>shortcut method</em> figures out the variance without having to compute the mean. The formula is

$s^2=\frac{n\sum x_i^2-(\sum x_i)^2}{n(n-1)}$

where n=10 is the sample size .

So, using the shortcut method,

$s^2=\frac{10*10,061.91-96,286.09}{10*9}=48.1446$

8 0

3 years ago

Probability, please help i will give brainliest

Cloud [144]

Answer:

Step-by-step explanation:

2 colours were taken

8 0

3 years ago