Half life can be used to solve for the amount (A) of a substance left after t time by using the following equation:

A=Av(0)⋅(12)^(t/h)

If the half life of a substance is 2 days, how long will it take for 100 mg of this substance to decay to 12.5 mg?

Select one:
A. 10 days
B. 4 days
C. 8 days
D. 6 days

Answers

Answer 1
D- 6 days should be the answer, hope it helps!

Related Questions

PLS HELP! THIS IS WORTH 30 POINTS!

Scale factor of ______: 0.125 or 8

This scale factor is ______: An enlargement or a reduction

Answers

Answer: The First One Is 8 And The Second One Is A Enlargement

0.3 x 8 = 2.4

And Im Pretty Sure That 2.4 Is Bigger Then 0.3

The answer for the first one is 8 and it’s a enlargement

At Silver Gym, membership is $45 per month, and personal training sessions are $25 each. At Fit Factor, membership is $75 per month, and personal training sessions are $15 each. In one month, how many personal training sessions would Sarah have to buy to make the total cost at the two gyms equal?


Sarah would have to buy ____ personal training sessions to make the total cost at the two gyms equal.

HELPPP

Answers

Ok she would have to buy 5 personal trainers to be equal the same with the other gym.

Gym 1 is $25 ( $25, $50, $75, $100)
Gym 2 is $15 ( $15, $30, $45,$60, $75)

$75 is are match
She would have to buy 5 hope this helps

Which value us not a solution to 3 > w + 17

Answers

Answer:

w=3

Step-by-step explanation:

Answer: any number greater than -14

Example : 3 , 5 , -1 , 0

Step-by-step explanation:

Please help. I only need parts a and b.

Answers

Answer:

oI know that for a they are pretty much the same shape im not sure how else to desribe it sorry

Step-by-step explanation:

4) HELP ASAP is about cylinders and stuff and I have to wash dishes and stuff so please help me and if you can show work that would be amazing THANK YOU :)

Answers

Answer:

C. 533.8 ft. squared

Step-by-step explanation:

Depending on the Pi that you use, the answer should be fairly close, for this I used the full Pi in the equation and got about 534.07 and answer C is closest to that answer so C is the best option.

Hope this helps! Have a good day/night!

What is the Q3 of the data set: 1,2,4,1,2,3,3,2 ? *
A. 3
B. 5
C. 2
D. 4
E. Other:

Answers

Answer:

Given the points A, B, C, D, calculate:

(a) the angle B of the triangle ABC

(b) the area of the triangle ABC

(c) the median BE of the triangle ABC

(d) the height AH of the triangle ABC

(e) the volume of tetrahedron ABCD

(f) the point E so that ABCE is a parallelogram.

A(-1, 2, -3), B(4, -1, 0), C(2, 1, -2), D( 3,4,5)​

Step-by-step explanation:

Why is 90 the sum of all factors of 40, including 40? The factors of the number 40 are: 1, 2, 4, 5, 8, 10, 20, 40. If you add them up, you will get the total of 90.

the Q3 to your question is 4

Point Q is plotted on the coordinate grid. Point P is at (20, −30). Point R is vertically above point Q. It is at the same distance from point Q as point P is from point Q. Which of these shows the coordinates of point R and its distance from point Q?


A. Point R is at (−40, 30), a distance of 60 units from point Q
B. Point R is at (−40, −10), a distance of 20 units from point Q
C. Point R is at (−40, −30), a distance of 60 units from point Q
D. Point R is at (−40, 10), a distance of 20 units from point Q

Answers

Answer:34

Step-by-step explanation:

give brainlest on time limit pls help

Answers

Answer:

336 sq un

Step-by-step explanation:

The area of a rhombus is pq/2 where p and q are the diagonals.

you have:

p = 12 + 12 = 24

q = 18 + 10 = 28

so the formula would be:

24 * 28 / 2 = 336 sq un

ASSAAAAAAAPPPPP 15 POINTS BRAINLEST OF CORRECT

EXOPNENTIAL GROWTH AND DECAY PROBLEM
The half-life of radioactive kind of tellurium is 9 hours. How much will be left after 18 hours, if you start with 704 grams of it?

Answers

Answer: Zero grams

Step-by-step explanation:

Half life means half of the atom is decayed, meaning in 18 hours all of it would be gone. If you want to get really specific there would be one atom left.

Zero grams is the answer, hope this helps you out!!

what is the coefficient of 11

Answers

Answer:

The coefficient of a term will be the numerical value in the term.

Here there is no variable but, we consider it like this:

11 = 11x {Here x=1}

Thus the coefficient will be 11 as the coefficient of 11x is 11

Explanation of converting 11 into 11x (will be helpfull if you belong to lower grade):

We know that 11×1 is 11 itself. Thus if we take x with value of 1 then 11x will have the value of 11 itself.

1. R(2,7) Across the y-axis Across the x-axis:​

Answers

Answer:

Point  R(2,7) has coordinates of (x, y), where x = 2 and y = 7, so

Across the y-axis = 7Across the x-axis = 2

Answer:

(- 2, 7 ) and (2, - 7 )

Step-by-step explanation:

Under a reflection in the y- axis

a point (x, y ) → (- x, y ) , then

(2, 7 ) → (- 2, 7 )

Under a reflection in the x- axis

a point (x, y ) → (x, - y ) , then

(2, 7 ) → (2, - 7 )

Find the equation of a straight line that passes through the points (-9,4) and (3,-4)

1. y = -2/3x + 10

2. y = -3/2x + 10

3. y = 2/3x + 10

4. y = -2/3x - 2
NO WORK NEEDED!!!

Answers

4. Y= -2/3x-2 is the correct answer
Number 4 y= -2/3x-2 is right

This figure is 14 of a circle.

What is the best approximation for the perimeter of the figure?

Use 3.14 to approximate pi.

4.7 cm

7.7 cm

10.7 cm

18.8 cm

Answers

b it should be right i took it

Haydn made a scale model of a building.The actual height of the building is 75 feet. Haydn's model used a scale in which 1.5 inch represented 30 feet.What is the height in inches of Haydn's model?

Answers

Answer:

3.75 inches

Step-by-step explanation:

In order to find the height in inches of Haydn's model we have to look at the scale he is unsing. He is using a 1.5 In: 30 ft scale. so every 30 feet of the building is 1.5 inches of the model. divide the 75 by 30 feet  to see how many times the 30 feet are used. 75 divided by 30 is 2.5. Now since we know that 30 occurse 2.5 times we can multiply 1.5 * 2.5. remimber for every 30 feet of the actual building there is 1.5 inches in the model. 1.5 * 2.5= 3.75 which gies us our answer.

75/30=2.5

1.5 * 2.5=3.75

hope that makes sence. :)

3.75 inches i’m pretty sure

guys
help.like pls, if i dont finish this homework my moms gonna take my phone away

Answers

Answer:

105

Step-by-step explanation:

Answer : 105 good luck on your homework!

What is the quotient of 30 and 3? A 33 B 27 C 90 D 10

Answers

I am just guessing but you might try A

On the coordinate plane. What is the length of BC if the B coordinate is (1 , 6)
and the C coordinate is (8 , 1) Round to the nearest tenth of a unit.
Which is the correct answer?
- 3.5 units - 8.6 units
- 4.9 units - 15.0 units

Answers

You just have to plug your coordinates into the distance formula.
(1, 6) (8, 1)
(X1, Y1) (X2, Y2)

do the work and you get 8.6
You will end up getting 8.6 that will be the answer

Which measurement is closest to the volume of the sphere in cubic inches?

Answers

The answer is about 904.32


The formula to find the volume of a sphere is V = 4/3 • pi • (r • r • r)

a rectangle that is 30 inches long and 10 inches wide can be divided into two congruent squares. True or false?

Answers

Answer:

False

Step-by-step explanation:

To split the rectangle into 2 parts, you can go one of two ways. One way would make the parts 15" by 10", and the other way would make the two parts 30" by 5". Neither way is equal on all sides, which means neither one is a square. That would make the statement false.

                                                                30

_  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _

|                                                                                                                            |

|                                                                                                                            |

|                                                                                                                       5   |

|                                                                                                                            |

| _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _|

|                                                               30                                                         |

|                                                                                                                             |

|                                                                                                                       5    |

|                                                                                                                             |

| _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _ |

                                                          30

 _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _  

|                                15                         |                                15                            |

|                                                             |                                                               |

|                                                             |                                                               |

|                                                             |                                                               |

|                                                             |   10                                                        |

|                                                             |                                                               |

|                                                             |                                                               |

|                                                             |                                                               |

|                                                             |                                                               |

|  _  _  _  _  _  _  _  _  _  _  _  _  _  _  |  _  _  _  _  _  _  _  _  _  _  _  _  _  _  _ |

**Pretend my drawings are accurate to the lines, the tops and bottoms are actually 30 and 10 in measurement   :-) **

Hope this helps!

Answer:

I think false

Step-by-step explanation:

That's probably going to lead to 3 congruent squares i think, not the answer you were looking for? Sorry, that's all the evidence i have

what inequality equation equals to 28

Answers

The Answer should be twenty eight 28

Graphically determine whether the following functions are Even, Odd or Neither. What are these 3 determined as?

Answers

Answer: Odd

Step-by-step explanation: not too good at this but I just counted where the lines met and the all are odd numbers

Answer:


Neither




Step by step explanation:
Neither

Which is equivalent to 4/15?



A.3.75



B.2.6¯


C.0.415



D.0.26¯

Answers

Answer:

0.26 D. !!!

Step-by-step explanation:

What is the value of the expression (–5) -3?

1. Apply the negative exponents rule:
1
(−5)3

2. Expand the power:
1
(−5)(−5)(−5)

3. Simplify:
1
x

What is the value of x?

x =

Answers

The answer to (-5)-3 is -8. I may be wrong but I did the work.

Answer:

-125

Step-by-step explanation:

Can someone answer this please. I will mark brainliest, answer and provide explanation please.

Answers

Answer:

The estimated number of people attending the fair this year is 14,646. The approximate number of people receiving prizes is 976.

Step-by-step explanation:

To estimate this year's attendance, I calculated the difference in attendance for each year. 1,176 more people attended in year 2 than in year 1; 1,763 more people attended in year 3 compared to year 2; and 1,087 more people attended in year 4. Totaling to 4,026 more people attending in year 4 than in year 1. From there, I found the average rate of change by dividing 4,026 by 3 to get 1,342. So, on average, 1,342 more people attend the county fair each year. Add that to 13,304, and we get 14,646.

20% of 14,646 is the equivalent of 14,646 ÷ 5. 14,646 ÷ 5= 2,929.2. I rounded this to 2,929. So, 2,929 people will receive raffle tickets.

2,929 ÷ 3= 976 [tex]\frac{1}{3}[/tex]. We round this to 976. So, we can guess that 976 people who attend the county fair will receive a small gift.

A right triangle has vertices at the origin, (0, 5) and (12, 0). The triangle was dilated with a scale factor of 3. What is the perimeter of the resulting triangle? Round to the nearest whole number, if necessary.

Answers

Answer:

The three vertices are (0,0), (0,15) and (36,0).

Step-by-step explanation:

Dilation : Multiply all vertices' values.

Vertice 1 : Origin = (0,0); (0*3,0*3) = (0,0)

Vertice 2 : (0,5); (0*3,5*3) = (0,15)

Vertice 3 : (12,0); (12*3,0*3) = (36,0)

1. Jefferson drew a line 9.5 inches long. Brittany drew a line 10 times as long. What is the difference in length between the two lines? Explain or show your work.






2. A store has a contest to guess the mass of 10,000 peanuts. If a peanut has a mass of about 0.45 gram. What would be a reasonable guess for the mass of 10,000 peanuts? Show or explain your work.




3. Ms. Webster works 4 days a week at her office and 1 day a week at home. The route to Ms. Webster’s office is 23.7 miles. The route home is 21.8 miles. About how many miles does she drive for work each week? Show or explain your work.





4. Isaac bought three packages of nuts. He bought one package of peanuts that weighed 3.07 pounds. He also bought two packages of pecans that weighed 1.46 pounds and 1.5 pounds. Did the peanuts or the pecans weigh more? How much more? Show or explain your work.





5.A pick-your-own pecan farm charges $1.35 per pound of pecans plus $0.40 per pound to crack the pecans. Amelia picks 20 pounds of pecans. The farm cracks 5 pounds for her. How much does Amelia pay all together? Show or explain your work.



6.The times for five sprinters in a 50-meter dash were 6.72 seconds, 6.4 seconds, 6.08 seconds, 7.03 seconds, and 6.75 seconds. Write these times from fastest to slowest.


7.One serving of scrambled eggs contains 7.8 grams of fat. Mr. Jensen is trying to eat no more than 60 grams of fat per day. If he eats 1.5 servings of scrambled eggs for breakfast, how many more grams of fat can he eat that day? Show or explain your work.





8. A rectangular doormat is 21 inches long and has an area of 714 square inches. Find its width. Will the doormat fit an entryway that is 36 inches wide? Show or explain your work.




9.Estimate the quotient 3,582 divided by 43. Show or explain your work.







10.The band spent $1,480 for food on the end-of-the-year picnic. If 73 band members attended the picnic, what is the best estimate of the cost of food per member? Show or explain your work.

Answers

Answer:

1. Jefferson drew a line 9.5 inches long. Brittany drew a line 10 times as long. What is the difference in length between the two lines? 9.5 x 10 = 95

95-9.5 = 85.5

2. A store has a contest to guess the mass of 10,000 peanuts. If a peanut has a mass of about 0.45 gram. What would be a reasonable guess for the mass of 10,000 peanuts? Show or explain your work.

4,500 grams because 0.45*10,000 is 4,500.

4. Isaac bought three packages of nuts. He bought one package of peanuts that weighed 3.07 pounds. He also bought two packages of pecans that weighed 1.46 pounds and 1.5 pounds. Did the peanuts or the pecans weigh more? How much more? Show or explain your work.

The one package of peanuts weigh more than both of the packages of pecans. (Work: 3.07-2.96= 0.11 pounds.) The package of peanuts weigh 0.11 pounds more than the 2 packages of pecans.

I Agree to his answer^

4000 peoplw attended a football game. If 4% of the people who attended were teenagers, how many teenagers attended the game?

Answers

160 teenagers. 4000 times 5% is 160
160 teenagers attended the game

someone help asap plz

Answers

Answer:

96% your rounding would be 100%

Step-by-step explanation:

4% x 24= 0.96%

you have to multiply 4 and 24 then your would get 96 and round to 100

Answer All Three Questions.

Answers

Answer:

its 1

Step-by-step explanation:

Answer:

1.) -3, -2, -0.8, -1/10(-0.1), 1/2(0.5), 0.8, 7

2.)-3

3.)7

Determine the following probability

Randomly selecting a three child family with either zero or one boy child

The probability is.....?

Answers

Probability is 7/8. Sorry if I got it wrong, but since no others are answering, thought I might give it a go.
Other Questions
I dont understand please help You purchase a car for $20,000. It depreciates 30% each year. Which formula calculates how much your car will be worth in 10 years? How many cubic units would take to make a model of a recrangular prisim that is 6 units long x 3 units wide x 2 unita high? Write a summary of the article in 4-5 sentences. The sit-in movement I need help with this question because I dont understand it Last month Eric spent 87.00 dollars on games. This month he only spent $92.00. Whatwas the percent change? Round 3.55 to the nearest tenth. During the annual Black Friday Sale, The OLX sold a pair of ski boots, regularly priced at $245.00, at a discount of 40%. The boots cost $96.00 and expenses are 26% of the regular selling price. For how much were the ski boots sold? Which of the following expressions is equivalent to 8.8.8.8.8.8? Please help and please make sure its right A common theme, related to the gods reactions to human behavior, in the Greek myth and the Egyptian myth is ______. The question that is asked geometry Find x and y given that the quadrilateral is a parallelogram 9. squareA =s= 15 ft how to solve 46 divide by 6 and change it to a multiplication equation 3.1 Simplify the following ratios:3.1.1 500g: 3 kg- 15 Which of the following uses proper subject-verb agreement?ANeither Carl nor Samuel hike on the weekends.B.Joe or James drive the car to school every Friday.C.Sarah and Lionel walks to the bus stopD.Neither Amy nor Marcus likes ice cream. In triangle ABC, the measure of angle CAB is 80 and the measure of angle ABC is 45.5. What is the measure of angle BCA in degrees? A 125.5125.5 degrees B 54.554.5 degrees C 55.555.5 degrees D 64.5 What is the equation in slope-intercept form of the line that passes through the point (2,-2) and is perpendicular to the line represented2y =5*X + 2?5y = -x-3B5y=-x +325Y=2*+7D5y = x-7Nor Evaluate f(a+4) pls help me w this !