Mathematics High School

If you start with 7,152 grams of a radioactive kind of lanthanum and the half-life is 93 minutes, how much will be left after 186 minutes

Answers

Answer 1

Answer:

1788 grams

Step-by-step explanation:

If you start with 7,152 grams of a radioactive kind of lanthanum and the half-life is 93 minutes, how much will be left after 186 minutes

We are to find Nt

The formula is given as:

Nt = No(1/2)^t/t½

Where

No = Initial amount = 7,152 grams

t = time elapsed = 186 minutes

t½ = Half life = 93 minutes

Nt = Amount of substance left

Nt = 7152(1/2)^186/93

= 1788 grams

Related Questions

What is the radius of 18 circle?




​

Answers

To find the radius, then, we insert 18 in for the circumference. So 18=2∏r. Solving for r gives 9/∏, or approximately 2.86 inches.

If 6 pounds of grapes costs $1.89, how much would 15 pounds of grapes cost?

Answers

So divide 1.89 by 6 to see how much would one pound of grape be
1.89/6=0.315
Then multiply 0.315 (price for one pound of grape ) by 15
0.315*15 =4.725 $for 15 pounds of grape

Largest three-digit multiple of 2

Answers

Answer:

956

Step-by-step explanation:

Answer:

658

Step-by-step explanation:

hellp me pls i need to pass this class or my parents will kill me for not passing

Answers

Answer:

hello wat is the matter how can I help I am a tutor I can teach you

Are the ratios 1:20 and 2:4 equivalent?

Answers

Answer:

no

Step-by-step explanation:

Answer:

Simple answer, no.

Simplify and then evaluate the equation
when a = 2 and b = 4.
b2 + 3(b-b2) – 2a = [?]
Help please

Answers

simplify - 2b^2 -2a +3b ( give me a sec i'm trying to evaluate now )

Hola. Ayuda con estos problemas de geometría plana. Regalo 20 puntos a la respuesta correcta...​

Answers

hola i don’t understand

Answer:

GRA

Step-by-step explanation:

what's an expression that represents 5 less than the product of 7 and a number?

Answers

Answer:

7x-5

Step-by-step explanation:

find the value of given expression

[tex] \sqrt{32 + 4} [/tex]
​

Answers

Answer:

± 6

Step-by-step explanation:

Given

[tex]\sqrt{32+4}[/tex]

= [tex]\sqrt{36}[/tex]

= + 6 or - 6 , that is ± 6

Answer:

√{32+4}=√36=√6²=±6 is your answer

Pwease help me <3 Have a great day y’all!

Answers

Answer
2.25
Step by Step
9/4=2.25
2.25x4=9

PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!

Answers

Answer:

268.083

Step-by-step explanation:

volume of a sphere = 4/3 times pi times r^3. 4/3(pi)(4^3) = 268.083

lec types 3/5 of a paragraph in 2/3 minute. If he continues at the same rate, what fraction of a paragraph can Alec complete in 1 minute?

Answers

Answer:

ik you in MS 118 but still the answer is 9/10

Step-by-step explanation:

multiply by the reciprocal 3/2.

3/5x3/2=9/10

Find each percent change. Round to the nearest tenth of a percent. State if it is an increase or decrease. From 79 miles to 84 miles
A) 6.3% decrease
B) 5% increase
C) 6% decrease
D) 6.3% increase​

Answers

Answer:

the answer is d.

Step-by-step explanation:

first, you want to use the formula,

new value - original value

____________________

         original value              * 100

you see that 84 is the new value and 79 would be the original value. substitute the numbers in. this is a increase since you will get a positive value.

84 - 79

______

   79      * 100

now we solve it.

5

__

79  * 100

you can either solve the fraction first then multiply that by 100 or multiply the numerator by 100 first then divide that by 79, each way works.

500

____

 79   =  approximately 6.3% increase (this is not a exact value, just rounded)

      or

5

__

79  = approximately 0.063 (this is not a exact value, just rounded)

0.063 * 100 = 6.3% increase

This is actually geometry but anyone PLEASE PLEASE PLEASE HELP ME ​

Answers

Answer:

Step-by-step explanation:

[tex]sin\theta =\frac{opposite\ side}{hypotenuse}\\ \\ sin37^o=\frac{6}{10}[/tex]

Can y’all help me quick

Answers

Answer:

It would be around 48 so D

Answer:

D - 48

Step-by-step explanation:

Only Answer Closest... look at where the others are and see where ten is and where the y value would be in the point.

What is the equation from this graph?

Answers

The answer is y= 1/2x-4

I think this is easy but I wasn’t paying attention so thanks for helping!

Answers

The answer would be

5 = (1/4)c

The area of a rectangular parking lot is 8051 m ^2 . If the length of the parking lot is 97 m, what is its width?

Answers

Answer:

Width of rectangle = 83 meter

Step-by-step explanation:

Given:

Area of rectangle = 8,051 m²

Length of rectangle = 97 m

Find:

Width of rectangle

Computation:

Area of rectangle = Length of rectangle x Width of rectangle

97 x Width of rectangle = 8,051

Width of rectangle = 8,051 / 97

Width of rectangle = 83 meter

I need help pleaseeeeeeeeeee

Answers

Answer:

man  this pmo i cant get the answer lol

Step-by-step explanation:

7th grade math , not sure if I set this up correctly!

Answers

Answer:

What you did is correct!

Factor 18r+15s escribe tu respuesta como un producto con un número entero >1?

Answers

18r+15s add it then yu will get

Can anyone help me with this?

Answers

Answer:

I think your answer is a

Step-by-step explanation:

A baby gains about 15 pounds each month. About how much weight will the baby have gained after 6 months? a. About 7.5 pounds b. About 8.5 pounds C. About 9 pounds d. About 10.5 pounds​

Answers

Answer:

I'm going to assume you meant 1.5 pounds and not 15 pounds each month.

Step-by-step explanation:

1.5*6=9

C

Answer:

around 90 pounds

Step-by-step explanation:

15×6

or 15+15+15+15+15+15 if multiplying is not your thing

A spotlight can be adjusted to effectively light a circular area of up to 6 meters in diameter. To the nearest tenth, what is the maximum area that can be effectively lit by the spotlight? Use 3.14 for pi.

Answers

i know im late but i will still grab these points

Answer: 28.27 m

Step-by-step explanation: A = 1/4 π d2= 1/4 * π * 6*2 ≈ 28.27

Answer: 28.27

Step-by-step explanation:

i need help 50 pts plz asap

Answers

Answer:

c

Step-by-step explanation:

a: 9/5 and 19/10 are already in simplest form

b:25/35 can be simplified to 5/7 if you divide each side by 5 and 20/24 can

  be simplified to 5/6 if you divide each side by 4

c: both 15/10 and 21/14 can be simplified to 3/2

d: 4/6=2/3 and 10/16=5/8

Answer:

c

Step-by-step explanation:

A hollow ball is made of rubber that is 2 centimeter thick. The ball has a diameter of 20 centimeters at the outside surface.

What is the exact volume of rubber used to make the ball?
Please explain how to find the volume and i will mark brainliest

Answers

Answer:

628.57CM²

Step-by-step explanation:

20/2=10

VOLUME OF CYLINDER=PIR^2H

22/7*10*10*2=628.57

Plzzz help I don’t understandddddd

Answers

Answer:

k = -10.5

Step-by-step explanation:

k + 7.5 = -13

Subtract 7.5 from both sides

k + 7.5 - 7.5 = -13 - 7.5

            k = -20.5

Robert takes out a loan for $7200 at a 4.3% rate for 2 years. What is the total paid amount at the end of the loan?

Answers

Answer:

$7819.20

Step-by-step explanation:

total paid amount at the end of the loan= loan taken + interest on the loan

loan taken = $7200

interest on the loan can be determined using this formula

Interest = principal x intrest rate x time

7200 x 0.043 x 2 = $619.20

total paid amount at the end of the loan= $7200 + $619.20 = $7819.20

 WHO KNOWS FUNCTIONS AND ALL THAT PLZZZ HELP ME ASAP I REALLY NEED IT PLZZ

Answers

Answer: Linear, Nonlinear, Linear, Nonlinear

Step-by-step explanation:

First 1: as x increased y also increased which means the thing is a line hint linear

Second 1: According to the points (u can graph them out if u want to) it goes down then up which isn't a straight line hence quadratic or nonlinear

Third 1: first degree hint linear

Fourth 1: Absolute value thing looks like a V when u plot it so its not linear

1/3 x - 6 = 3 what is the answer for x

Answers

Answer:

x = 3

Step-by-step explanation:

Answer:

x=27

Step-by-step explanation:

Other Questions
A depositor at a credit union is called a _____.acquirermember-ownerissueremployee Expand (2+x)^3 using binomial theorem A helicopter hovers 1500 feet above a small island. Thefigure shows that the angle of depression from thehelicopter to point P is 40.How far off the coast, to the nearest foot, is the island?4001500ftPlease help me solve this problem What is the speed of a bird that flies 25 meters in 25 minutes? Write an equation of the line that passes through (-6,0) and (0,-24) ILL GIVE BRAINLIST HELP ME ON MY IREADY ?!!!! what is the term for your body being at equilibrium If a Tv costs $910 and the sales tax is $80, how much will the TV cost in total? Find the measure of a 3.{>4390{{43 = [?]Fnter 2.5 Critically discuss how community needs may influence your choice of a careerand indicate how that may help the community. Una fuente circular tiene un dimetro de 80 pulgadas conciderando que una pulgada equivale a 2.54cm cual es la medida de su ratio PLZ HELPwill give brainliest to best answer if I canYou are testing a solution for pH and find it to be 8.31 on the pH scale. Is this solution acidic, basic or neutral. Explain. what is the slope of the lines segment with the endpoint (2,-5) and (-8,3) Screenplays are written in a format that separates the story into various parts, including scene directions, action, characters, dialogue, and transitions. Take a few minutes to review the sample script. This sample script describes the fundamentals of writing a screenplay.Assignment DirectionsWrite an original short screenplay using the standard script format described above.The script should be at least one complete scene (3 to 5 pages). It must be set in a minimal of three locations. (Different rooms in your home or school can serve as different locations for this assignment.) The script must feature at least two characters and dialogue. development of self in the society what type of phone do i have can u guess by the looks of it how do I say social studies on French 6 What is the quotient of 895.32 and 102 ? In a unit circle, the point (-0.5,0.866) lies on the terminal side of an angle, theta. What is the sine of this angle? Helppp I do want a specific answer not just a whole paragraph....