Ask question

Ask question

All categories

2 years ago

5

a bag contains 30 lottery balls numbered 1-30. A ball is selected, replaced, then another is drawn. Find each probability

1 answer:

Artyom0805 [142]2 years ago

4 0

30*29*28*27....etc. Try that

You might be interested in

PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA POINTS*.. <br> IM GIVING 40 POINTS !! DONT SKIP :((.

dybincka [34]

Answer:

Step-by-step explanation:

Y= X - 4

Hope this helps!

Thanks for Brainliest!

6 0

2 years ago

Read 2 more answers

Find the slope of the line that passes<br> through these two points.

AysviL [449]

Answer:

1/5

Step-by-step explanation:

$\frac{2-1}{3--2} = \frac{1}{5}$

8 0

2 years ago

Read 2 more answers

Why do you need to calculate mean, or modo of a set of data?

goldfiish [28.3K]

To find the average of the data

3 0

2 years ago

You have been asked to design a can shaped like right circular cylinder that can hold a volume of 432π-cm3. What dimensions of t

rosijanka [135]

Answer:

$Height = 12cm$

$Radius = 6cm$

Step-by-step explanation:

Given

Represent volume with v, height with h and radius with r

$V = 432\pi$

Required

Determine the values of h and r that uses the least amount of material

Volume is calculated as:

$V = \pi r^2h\\$

Substitute 432π for V

$432\pi = \pi r^2h$

Divide through by π

$432 = r^2h$

Make h the subject:

$h = \frac{432}{r^2}$

Surface Area (A) of a cylinder is calculated as thus:

$A=2\pi rh+2\pi r^2$

Substitute $\frac{432}{r^2}$ for h in $A=2\pi rh+2\pi r^2$

$A=2\pi r(\frac{432}{r^2})+2\pi r^2$

$A=2\pi (\frac{432}{r})+2\pi r^2$

Factorize:

$A=2\pi (\frac{432}{r} + r^2)$

To minimize, we have to differentiate both sides and set $A' = 0$

$A'=2\pi (-\frac{432}{r^2} + 2r)$

Set $A' = 0$

$0=2\pi (-\frac{432}{r^2} + 2r)$

Divide through by $2\pi$

$0= -\frac{432}{r^2} + 2r$

$\frac{432}{r^2} = 2r$

Cross Multiply

$2r * r^2 = 432$

$2r^3 = 432$

Divide through by 2

$r^3 = 216$

Take cube roots of both sides

$r = \sqrt[3]{216}$

$r = 6$

Recall that:

$h = \frac{432}{r^2}$

$h = \frac{432}{6^2}$

$h = \frac{432}{36}$

$h = 12$

Hence, the dimension that requires the least amount of material is when

$Height = 12cm$

$Radius = 6cm$

3 0

2 years ago

Pleaseeee helpppppppppppp

Savatey [412]

Answer:

Hope this helps

<ACE= 31 degrees

<ADB: 41 degrees

<AFE: 70 degrees

<ehd: 100

Step-by-step explanation:

6 0

3 years ago