Mathematics High School

You have 192 grams of a radioactive kind of iodine. How much will be left
after 28 hours if its half-life is 7 hours?

Answers

Answer 1

Answer:

192/2= 96 g after 7h

96/2=48 g after 14h

48/2= 24 g after 21h

24/2= 12 g after 28h

Related Questions

someone please help me solve this: - 2x + 10 + 5x = 40​

Answers

Answer:

X=10

Step-by-step explanation:

So, -2x+10+5x=40. first we subtract ten from both sides, getting us to -2x+5x=30, then we subtract 2x from 5x, because its negative, getting us to 3x=30, basically x=10.

ANSWER:
x=10

STEP BY STEP:
look at image for step by step

A store is having a sale on trail mix and jellybeans for 3 pounds of trail mix and 5 pounds of jellybeans the total cost is $23 for 6 pounds of trail mix and 2 pounds of jellybeans the cost is $20 find the cost for each pound of trail mix in each pan of jellybeans

Answers

Answer:

The jelly beans cost $2.25 / pound

The trail mix costs $1.25 / pound

Step-by-step explanation:

I just took the test.

Deondra surveyed 240 of the students in her school about their favorite color.
Students could choose between purple and blue. 15% said their favorite color was
blue. How many students' favorite color was purple?

Answers

Answer:

the answer is 180 students.

Step-by-step explanation:

I got this by subtracting 15 by 100 and got 75. This means 75% chose purple. Then you take 75% of 240 and that's your answer

Answer:

204

Step-by-step explanation:

ok

-2x-5 = 19
I need help with this

Answers

Answer:

-12

Step-by-step explanation:

First you add five to the 19 and get 24 and then you divide -2x by 24 and you get -12

Answer:

x=-12

Step-by-step explanation:

-2x-5=19

+5 to both sides

-2x=24

÷-2 to both sides and you get -12

1/5 + (-4/5) please help me

Answers

Answer:

when added we get -0.6

Step-by-step explanation:

so -0.6 is your answer!

Answer:

-3/5

Step-by-step explanation:

need the answers to this with the work show and done before 11:30!!!! pls answer fast

Answers

what’s the question

The line L1, is y= 5x+1
The line L2, is 2y-10 +3=0
Show how these 2 lines are parallel

Answers

Answer:

Step-by-step explanation:

L₁: y = 5x + 1

Slope of L₁ = 5

L₂: Did you mean 2y - 10x +3 = 0 ?

2y = 10x - 3

y = 5x - 1.5

Slope of L₂ = 5

L₁ and L₂ have the same slope, so the lines are parallel.


please help it's definitely not E and i'm pretty sure it's not C
HELPPP ILL MARK YOU THE BRAINLYEST

Answers

it’s c because peep how it’s listed least to greatest

How do i answer this? Please help

Answers

Answer:

which 1st page or 2nd page

x/2+ 1 = 9
options:

x = 16

x = 20

x = 4

x = 5

Answers

X=16


16 divided by 2=8+1=9

Hope this helps!:)

Enter non-integer answer as a decimal.

**Notice, it is going to hit right at the point (8,175) where the arrow touches**

Answers

Answer:

Step-by-step explanation:

mi/gal=175/8, as a decimal

21.875 mi/gal

The height of a triangle is 2 less than 5 times its base. If the base of the triangle is x feet, and the area of the triangle is 12 square feet, which
equation models this situation?
A. 5x^2-2x-24=0
B. 5x^2-2x-12=0
C. 5x^2-2x-6=0
D. 25x^2-10x-24 = 0

Answers

The answer would be c I just took the quiz



When finding the probability of getting a heads when flipping a coin. Which of the following should produce an experimental probability closest to the theoretical
probability?

Answers

Answer:

ADD EVERTHING UP

Step-by-step explanation:

What is the range of (-1, 75), (0, 15) and (1, 3)?

Answers

the answer is below in the picture

Who wants to help me with my work for online school for money...? I’ll pay 100 dollars if you catch me up on my work on canvas. E mail me at kanemagdalene at g mail .com if interested

Answers

Answer:

I am sorry I have my own work to do. Why don't you try catching up on it yourself maybe that would work. I also hate to break it to you but you could get in big trouble in any of your teachers find out.

Step-by-step explanation:

I know I did not help or anything but can I have a brainliest?

Is income salary? or is it the *take home pay* after tax deductions are made? and if it is the second one, then is income the same as *net monthly salary?*​

Answers

Yea salary typically makes up a persons income
Yes take home pay is after deductions. Usually differentiate by gross income and net income.

Net income would be the same as net monthly salary and take home pay.


Basically you get paid a salary and that that is gross income before deductions. Then money is taken out for taxes insurance retirement etc, and whatever is leftover is your take home pay or net income or net monthly salary whatever you wanna call it. Neto take home means after deductions

5. Given that Triangle EDF is congruent to Triangle QPR, what is the angle measurement
of Angle F? Fill in the blank with just the number.

Answers

Answer: the answer is 30 I took the test

Step-by-step explanation:

Please answer this quickly it’s for a test!

Answers

The answer to your question is C

Answer: I think its D, not positive though.

Step-by-step explanation:

Please help me, thank you so much!! It’s just the words, no photo just so you know.

Answers

Answer:

Step-by-step explanation:

formula: a^2 + b^2 = c^2

a^2 + 15^2 = 17^2

a^2 + 30 = 289

       -30    -30

a^2 = 259

(square root)

a = approximately 16

y= 1/6x find y when x= -60

Answers

Answer:

-10

Step-by-step explanation:

Plugin the value of x.

y=1/6(-60)

y=-60/6

y=-10

If this helped please consider giving brainliest.

I really need help with this!! If you know how to solve please help!

Find the sum of sides of a convex polygon if the sum of the measures of its interior angles is: 540 degrees, 1080 degrees, 1800 degrees, 1620 degrees, 2340 degrees, 3600 degrees, 2880 degrees, and 7560 degrees.

Answers

Answer:

18,540

what i know is 18,540

If f(x) = , g(x) = 5x, and h(x) = x + 4, find each value. h[f(4)], g[h(–2)], f[g(1)]. pls write the steps. DON'T SEND A LINK OR FILE!

Answers

Answer:

Step-by-step explanation:

anyone have the answer ??

Answers

Answer: D- -4 degrees

Step-by-step explanation:

2-3= -1 -1 - 3 = -4

Answer:

D. -4°C

Step-by-step explanation:

I could really use some help. I am trying to solve this for a friend, and I am completely stuck.

Answers

Answer:

-x2 + -x3 =x

there ya go

Ella S, Lily, Aziza, and Kevin earned a total of $100 shoveling snow. Each of them earned the same amount. How much did each of them earn? I will give 13 points

Answers

Answer:

$50 :)

Step-by-step explanation:

The proper height of a highway guardrail is 27 inches, but 3 inches higher or lower is acceptable. Which inequality represents the acceptable heights, h, of a highway guardrail?
A.|h+27|≤3
B.|h−3|≤27
C.|h+3|≤27
D.|h−27|≤3

Answers

Answer:

Step-by-step explanation:

27 is the "center" of a range of measurements of the height of the guard rail.  The height could be as much as 30 inches or as little as 24 inches.  The absolute value operator encloses "x - 27," where 27 is the "center."  The acceptable excess or acceptable deficiency is 3 inches.  

So now we can eliminate possible answers B and C, in both cases because 27 is inappropriately greater than 3.

Narrowing down our choices, we have h + 27 and h - 27 inside the absolute value operator.  27 is a positive quantity (height of the guard rail), so the inequality showing +27 as the "center" is correct; that is

D:  |h - 27| ≤ 3 (measurements in inches).

If one inch represents 3 units, what dimensions would you use to draw a rectangular field that is 20 units by 14 units?​

Answers

Answer:

Step-by-step explanation:

If 1 inch = 3 units,

Therefore 1 unit = ⅓ inches, so to answer your question we have to

Multiply it by 20, to have :

20 units = 20× ⅓ = 20÷3

20 units = 6.66

Therefore we can use the same principle in that of 14 units.

14 units = (14 × ⅓) inches

14 units = 4.66 inches

PLEASE GIVE BRAINLIEST.

please help times running out

Answers

Answer: c

Step-by-step explanation:

11. < ABE and < DBE are supplementary
angles. If the measure of < ABE is 61, what
is the measure of < DBE?

Answers

Answer:

119°

Step-by-step explanation:

< DBE = 180° - < ABE

or, < DBE = 180° - 61°

or, < DBE = 119°

hope it works, fanks !!

What is the slope of the line?

Answers

Answer:

8

Step-by-step explanation:

exponential growth

Other Questions
An incomplete sentence is given. The value of 2 x 1014 is times the value of 4 x 106" What number correctly completes the sentence? URGENT find the volume of these rectangular prisms. Round answers to the nearest tenth when necessary P=6 and q=5, what is the value of 3pq Name and TitleName of Lab:Student Name:Instructor:Date:ObjectiveThe purpose is to test whether the surface texture of the ground affects the distance an object can roll.HypothesisIf an object rolls over _______________ (type of material), then it will _____________ (describe the prediction of distance it will travel).MaterialsFor this lab, I used the following items:Steps, hard-cover books, blocks, or boxes to hold up the rampWood, foam board, hard-cover notebook, cookie sheet, or other flat surface for rampSmall ball (rubber, golf, tennis, etc.) or a can to roll down the rampRuler or tape measure; or Print a RulerTowel, carpet, cotton fabric, sandpaper, or other materials to alter the surface texture of the groundProcedureShort summary of what I did:I experienced the following errors while doing my experiment:Test (independent) variable (What was different about my test groups?):Outcome (dependent) variable (What was I measuring?):DataRecord the distance traveled for each of the trials for the three floor surfaces in the table below.Distance Object TraveledFloor Surface Trial 1 Trial 2 Trial 3Data AnalysisCalculate the average distance traveled for each floor surface. Use the following guidelines for calculating averages, and show your work.Floor Covering Calculation of the Average Average Distance TraveledExample (trial 1 measurement + trial 2 measurement + trial 3 measurement) / 3 (number of trials) Your answer from the calculation, showing the average distance the ball rolled for that floor covering.ConclusionAnswer the following questions in complete sentences.Describe in your own words what friction is.Describe how friction affected the results of your investigation.Does an object travel farther on a smooth or slippery surface or on a rough surface? Why?Propose another experiment that could be used to demonstrate that friction is a contact force. What is the are of the rectangle? L= x-4 W=4x-2 PLEASE ANSWER! What role did television begin to play inregards to the Vietnam War?A. It was the most trusted form of news on the war by Americans.B. It was censored by the American government during the war.C. It was not allowed to be used to broadcast news of the war toAmericans.D. It was controlled by President Lyndon Johnson. Jake has a bag of 50 beads, some of which are blue and the remaining are green. Jake randomly pulls out a bead from the bag, records the color, and replaces it in the bag. Jake has already recorded 16 blue and 4 green beads. Based on these results, what is most likely the number of blue beads in the bag?a.10 b.20 c.30 d.40 An illustration of an organism and a dichotomous key are given. What is the organism?12a. More than 6 legsb. 6 legs or lessa. Has wingsb. No wingsa. Single pair of wingsb. Two pair of wingsa. Wings are nearly equal sizeb. Forewings larger than hindwingsArachnidGo to step 2Go to step 3AntFruit flyGo to step 4DragonflyMayfly4ArachnidOk who wants to play? my id is the pictures PLZ help!! what the answer???? Help ASAP!!! What do I do!!! You are given that 5y = 4x.Find the value of y when x=10 if a parabola is horizontally translated 15 units left, stretch by a factor of 20, vertically translated down 30 units and reflected in the x axis determine the equation of the parabola in vertex form What is the best anime Consider the following static method, calculate. public static int calculate(int x){ x = x + x; x = x + x; x = x + x; return x;}Which of the following can be used to replace the body of calculate so that the modified version of calculate will return the same result as the original version for all values of x? return 8 * x; return 3 + x; return 3 * x; return 6 * x; return 4 * x; 17. Energy stored in foods is; digested foodreleasesenergy for movement andenergy as heat. PLEASE HELP! INSTA BRAINLY 1. Which of the following is not part of the aromatics used as a flavor basefor chicken stock?leeksonionscarrotschicken To make 4.25 L of 3.0 M NaOH solution how much of a 9.0 M NaOH solution would be needed? Choose a recent event from your local, national, or world news. In 6-8 complete Spanish sentences, describe the event in detail. What happened? Where did it happen? Who was involved? What was the outcome? What is your opinion about this event?