How many grams of a radioactive kind of neodymium will be left after 33 days if the half-life is 11 days and you start with
160 grams?

Answers

Answer 1

Answer:

20 grams will be left.

Step-by-step explanation:

Half-life is 11 days

This means that in each 11 days, you lose 50% of the amount.

33 days

33/11 = 3 half-lifes.

You start with 160 grams

After 11 days: 160/2 = 80 grams

After 22 days: 80/2 = 40 grams

After 33 days: 40/2 = 20 grams.

20 grams will be left.

Answer 2

Answer:10

Step-by-step explanation:

How Many Grams Of A Radioactive Kind Of Neodymium Will Be Left After 33 Days If The Half-life Is 11 Days

Related Questions

Determine the equation of circle A.
(x - 1)2 + (y + 2)2 = 9
(x + 1)2 + (y-2)2 = 9
(x-1)2 + (y + 2)2 = 3
(x + 1)2 + (y-2) = 3

Answers

I'm not sure but if you have photomath or Microsoft mathematics use it to solve your problem

PLEASE HELP
ASAPPPPPP
Which of the following segments is a diameter of O?A. OD
B. DB
C. АС
D. AB

Answers

Answer:

AB is the diameter,,,,,,,,,

What is equivalent to the equation y=3x+z/4?

Answers

parametric form.....


y=3x+ 1/4z

Help now ____________[_

Answers

10 x 5 = 50
4 x 7 = 28
3 x 4 = 12 12/2=6

50+28+6= 84 square inches

n = 40, p=0.95, X = 38
P(38) =

Answers

Answer:

36.1

Step-by-step explanation:

what is the answer of 17x12

Answers

Answer:

204

Step-by-step explanation:

17x12=204

The answer is 17x12=204

A speed boat travels 1040 meter in 30 minutes. How far will it go in an hour? *

Answers

Answer:

2080 meters

Step-by-step explanation:

An hour is double of 30 minutes so, if you double the length it went you would get how far it goes in an hour, 2080 meters.

Find the circumference and area of the circle. Use 3.14 for π. Round to the nearest hundredth if necessary. r = 2m

Answers

The answer is 12.57

But rounded to the nearest tenth is 12.6

If x = 13, how could the angles be classified? Are the angles complementary or supplementary?

Answers

Answer:

To be complement sum of angle must be 90°

But to be supplement sum of angle must be 180°

Step-by-step explanation:

What is the value of n

Answers

. n=8cm.

Step-by-step explanation:

Answer:

where is the equation

Step-by-step explanation:

Write the first 4 multiples of 3/8

Answers

Multiples of 3

: 3, 6, 9, 12, 15, 18, 21, 24, ...

Multiples of 4

: 4, 8, 12, 16, 20, 24, ...

Multiples of 8

: 8, 16, 24, ..

2

Find the smallest number that is shared by all rows above. This is the LCM.

LCM = 2424

Method 2: By Prime Factors

1

List the prime factors of each number.

Prime Factors of 3

: 3

Prime Factors of 4

: 2, 2

Prime Factors of 8

: 2, 2, 2

2

Find the union of these primes.

2,2,2,32,2,2,3

3

Multiply these numbers: 2\times 2\times 2\times 3=242×2×2×3=24. This is the LCM.

LCM = 2424

Does anybody know if it’s possible to find the answers online for Aleks math?

Answers

Try photomath or there should be some math apps on app store

5(3m+2)
please help me​

Answers

You would distribute the 5 to the 3m+2 so it would be 15m-10

Answer:

(5x3m) + (5x2) = 15m + 10

Step-by-step explanation:

multiply 5 to 3m plus 5 to 2 which is equivalent to 15m + 10

Y’all help meeeee :(

Answers

It is 60 since it is clearly not 30 and not 90 either. 120 and 150 are irrelevant.

pleeeaassseee brainliest to first person

Answers

Answer:

B.   128

Step-by-step explanation:

Answer:

by using Pythagoras law

hypotenuse ²=perpendicular ²+base²

h²=100²+80²

h²=10000+6400

h=√16400=128.06m

128m is the required answer.

Note: When solving for k, round to four decimal places. A culture started with 5,000 bacteria. After 3 hours, it grew to 6,500 bacteria. Predict how many bacteria will be present after 13 hours. Round your answer to the nearest whole number. P = Aekt Enter the correct answer. DONE + ?

Answers

Answer:

5000 * (e^((1 /4) * ln(55 / 50) * (13))) = 6,815.47 from My text book

Step-by-step explanation:

PLEASE SOMEONE ANSWER A REAL ANSWER WILL GIVE BRAINLIST

Answers

Answer:

a I think please be right

7ft
5ft
8ft
7ft
Find the area of each figure

Answers

wheres the figure..??

Divide $400 in the ratio 3 :5

Answers

Solution:

Given ratio - 3:5

1 part = 3

2 part = 5

Total no. of parts = 3 + 5 = 8 parts

400 / 8 = 50

3 * 50 = 150

5 * 50 = 250

I think that's it :D

if you borrow $1,200 for 3 years at an annual interest rate of 4% how much will you pay altogether​

Answers

Answer:

$1,344.00

Step-by-step explanation:

A=P(1+rt)

A=1,200(1+(0.04)(0.03))

Tyshawn drew a two-dimensional shape. The shape had multiple sides. The
shape had only right angles. There are two pairs of parallel lines. One pair is 4 inches

Answers

Answer:

This is a rectangle

Step-by-step explanation:

2D shape with 4 right angles would be a rectangle because 2 sides are equal and the other 2 would be equal to give you 4 right angles

A circular park has a circumference of 94 ft. find d, the diameter of the garden in feet

Answers

Answer:

94 / π = 29.9211293...

Step-by-step explanation:

brainliest plz

What is the end behavior for the graph of the function
f(x)=9/10 log [-(x + 9)] + 10?

Answers

Answer:If you draw a graph or look it up on Desmos, it curves down around y = 10. It only hits the second and third quadrant. B is the only situation that describes this.

Step-by-step explanation:g

welp me someone this iready is for a grade.

Answers

Answer: 1920 cubic centimeter

Step-by-step explanation:

L*W*H for both and add

8*10*10=800

8*10*14=1120

800+1120=1920 cubic centimeters

Yes or no
Just pick one

Answers

Answer:

Yes

Step-by-step explanation:

a. How much warmer is 82 than 40?
b. How much warmer is 82 than -40?
a. What is the difference in height between 30 m up a cliff and 87 m up a cliff? What is the distance between these positions?
b. What is the difference in height between an albatross flying at 100 m above the surface of the ocean and a shark swimming 30 m below the surface? What is the distance between them if the shark is right below the albatross?

Answers

Answer:

a. 42

b. 122

a. 57

b. 130

Step-by-step explanation:

For problem A:

because both of these values have positive numbers, just use normal subtraction

82 - 40 = 42 degrees warmer

For problem B:

because we are subtracting a negative number from a positive number, we add both of these numbers because 82 - -40 can also be equal to 82 + 40

82 - -40 = 122

For problem A:

the sentences 30m up a cliff and 87m up a cliff are describing positive values.

87 - 30 = 57

For problem B:

Now in this problem, the sentence 100m above the surface is describing a positive value, but the sentence 30m below the surface describes a negative value

how do I know this?

if the sentences above the surface and below the surface are describing positive and negative values, then there has to be a neutral value ( which is 0)

0 meters = the surface, because they are using both positive and negative values, meaning that the surface is the neutral value

by using a number line, you can draw it out like this

below the surface-------------------------the surface----------------------------above the surface

-30--------------------------------------------0--------------------------------------------100

therefore, 100 - - 30 = 100 + 30 = 130

The sum of all even numbers from 0 to 420 is

Answers

Answer:

the sum of all even number from 0 to 420 is 175980

can someone give me tips for flying on an airplane? ✈️ ​

Answers

Answer:

chew gum for your ears

bring a pillow for you neck

download a movie

bring something to do with your hands

bring a jacket

use the restoroom before the flight

bring your own snacks

get a seat near the wings of the planes its the safest

make sure you put your name on your luggage

bring headphones

bring lots of fluids after getting through security

bring a breathable mask

Step-by-step explanation:

PLS HELP ME YOU DON'T HAVE YO SHOW UR WORK

Answers

Answer:

b.

-2/3

Step-by-step explanation:

2/3 + (-2/3)

2+-2/3

0

hope this helps :)

On average, there are 12 potholes per mile on a particular stretch of the state highway. Suppose the potholes follow a Poisson distribution on the highway. a. Find the probability of finding fewer than two potholes in a quarter-mile stretch of the highway. (Do not round intermediate calculations. Round your final answer to 4 decimal places.) b. Find the probability of finding more than one pothole in a quarter-mile stretch of the highway. (Do not round intermediate calculations. Round your final answer to 4 decimal places.)

Answers

Answer:

a) 0.1992 = 19.92% probability of finding fewer than two potholes in a quarter-mile stretch of the highway.

b) 0.8008 = 80.08% probability of finding more than one pothole in a quarter-mile stretch of the highway.

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

[tex]P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}[/tex]

In which

x is the number of sucesses

e = 2.71828 is the Euler number

[tex]\mu[/tex] is the mean in the given interval.

a. Find the probability of finding fewer than two potholes in a quarter-mile stretch of the highway.

Mean of 12 potholes per mile, which means that in a quarter-mile stretch, the mean is [tex]\mu = \frac{12}{4} = 3[/tex]

This probability is:

[tex]P(X < 2) = P(X = 0) + P(X = 1)[/tex]

In which

[tex]P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}[/tex]

[tex]P(X = 0) = \frac{e^{-3}*(3)^{0}}{(0)!} = 0.0498[/tex]

[tex]P(X = 1) = \frac{e^{-3}*(3)^{1}}{(1)!} = 0.1494[/tex]

[tex]P(X < 2) = P(X = 0) + P(X = 1) = 0.0498 + 0.1494 = 0.1992[/tex]

0.1992 = 19.92% probability of finding fewer than two potholes in a quarter-mile stretch of the highway.

b. Find the probability of finding more than one pothole in a quarter-mile stretch of the highway.

This is

[tex]P(X > 1) = 1 - P(X < 2)[/tex]

We have that [tex]P(X < 2) = 0.1992[/tex]

So

[tex]P(X > 1) = 1 - P(X < 2) = 1 - 0.1992 = 0.8008[/tex]

0.8008 = 80.08% probability of finding more than one pothole in a quarter-mile stretch of the highway.

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