Ask question

Ask question

All categories

evablogger [386]

2 years ago

14

A box contains 4 red and 5 green marbles. if 6 marbles are drawn without replacement, what is the expected number of red marbles

?

2 answers:

qaws [65]2 years ago

6 0

The expected number is 2 marbles

cricket20 [7]2 years ago

6 0

I hope this helps i believe it is 1/3<span />

You might be interested in

What is the slope the line?

laila [671]

Answer:

the slope is 3/4x

Step-by-step explanation:

if you need it in slope intercept form too its y=3/4x-1

4 0

2 years ago

The following balls are placed in an urn: 6 red, 6 yellow, 6 blue, and 2 green. One ball is randomly drawn from the urn. What is

Aliun [14]

The probability is 8 out of 20 or 40 percent

4 0

2 years ago

A hot air balloon is flying at an altitude of 800 feet. A passenger takes a picture of the top of a tree and estimates that the

nalin [4]

The height of the tree given the depression angle to the top and the base

is given by the tangent relationship of the two given angles.

Correct response:

The height of the tree is approximately <u>79.58 feet</u>

<h3 /><h3>Methods used for the calculation of the height of the tree</h3>

Given:

Altitude of the hot air balloon = 800 feet

Angle of depression to top of tree = 43°

Angle of depression to base of tree = 46°

Required:

Height of tree

Solution:

The horizontal distance of the balloon from the tree is given as follows;

$\displaystyle tan(46^{\circ}) = \frac{Altitude \ of \ balloon}{Horizontal \ distance \ from \ tree} = \mathbf{\frac{800 \, feet}{Horizontal \ distance \ from \ tree}}$

Therefore;

$\displaystyle Horizontal \ distance \ of \ balloon \ from \ tree = \frac{800 \ feet}{tan(46^{\circ})}$

$\displaystyle tan(43^{\circ}) = \mathbf{\frac{Height \ of \ balloon \ above \ tree}{\dfrac{800 \, feet}{tan(46^{\circ})} }}$

Therefore;

$\displaystyle Height \ of \ balloon \ above \ tree = tan(43^{\circ}) \times \frac{800 \, feet}{tan(46^{\circ})}$

Height of tree = Altitude of balloon - Height of balloon above tree

Therefore;

$\displaystyle Height \ of \ tree = 800 \, feet - tan(43^{\circ}) \times \frac{800 \, feet}{tan(46^{\circ})} \approx \underline{ 79.58 \, feet}$

Learn more about angle of elevation and depression here:

brainly.com/question/1978238

4 0

1 year ago

Which pair of rectangles is similar ? A 3,8 and 2,6

ipn [44]

D because they are equal the same if you do 3×6=18 and 2×9=18
They have the same area amount.
~JZ
Hope it helps

4 0

2 years ago

(3+5^2) dividend by 4+19

Agata [3.3K]

Answer:

26

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers