The function f(n)=100(0.25)^n represents the amount of radioactive substance left after n hours. At what rate in percent is the amount of radioactive substance changing

Answers

Answer 1

Answer:

75%

Step-by-step explanation:

Given the function :

f(n)=100(0.25)^n

Comparing the function with

y = a(1 - r)^t

From. The equation, r = rate

Comparing with the value in bracket in the question given :

1 - r = 0.25

1 - 0.25 = r

0.75 = r

Hence, r = 0.75

As a percentage, rate = 0.75 * 100% = 75%

Hence, the rate of change is 75%


Related Questions

if bob is 4 years older than twice his neighbor's age, and the sum of their ages is 67, what is bob's age ?

Answers

Answer:

bob would be 46

Step-by-step explanation:

take 67 subtract 4 to get 63 and divide it by 3 to get 3 groups of 21

add 21 and 21 to get 42+4=46

An ice skater covered 825 meters in 55 seconds. Find his unit rate in meters per second.

Answers

Answer:

825/55=15 meters per seconds

Step-by-step explanation:

Hope this helps please give brainliest!

paul is 5 feet tall and casts a 12-foot shadow. A nearby tree casts a 42-foot shadow. how tall is the tree

Answers

17.5 feet is how tall it is

What’s the answerrrr please

Answers

-4,2 that is the answer

What is 2/10 simplified

Answers

1/5 is it’s simplified form

Answer:

2/10 simplified to lowest terms is 1/5

Step-by-step explanation:

hope this helps U_U

Function f (x) = 25x/x + 3 has a discontinuity at x = –3. What are Limit of f (x) as x approaches negative 3 minus and Limit of f (x) as x approaches negative 3 plus?

Answers

Answer: C

Step-by-step explanation:

edge2021

Write a system of equations to describe the situation below, solve using any method, and fill in the blanks. Clayton gets paid at home for doing extra chores. Last week, he did 4 loads of laundry and 5 loads of dishes, and his parents paid him $14. The week before, he finished 4 loads of laundry and 10 loads of dishes, earning a total of $24. How much does Clayton earn for completing each type of chore? Clayton earns $ per load of laundry and $ per load of dishes.

Answers

Answer:

$1.00 per load of laundry, $2.00 per load of dishes

Step-by-step explanation:

4($1.00) = $4

5($2.00) = $10

This equals $14, when he does 10 loads of dishes the number changes to $20 and by adding $20 to $4, that equals $24.

The answer is $1.00 per a load of laundry, $2.00 per load of dishes

What is an expression?

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

Last week, he did 4 loads of laundry and 5 loads of dishes, and his parents paid him $14. The week before, he finished 4 loads of laundry and 10 loads of dishes, earning a total of $24.

Clayton's earnings will be calculated as,

4($1.00) = $4

5($2.00) = $10

This equals $14, when he does 10 loads of dishes the number changes to $20, and by adding $20 to $4, that equals $24.

To know more about an expression follow

https://brainly.com/question/723406

#SPJ2

The price of a dress was
reduced from $60 to $45.
By what percentage was
the price of the dress
reduced?

Answers

Answer:

25%

Step-by-step explanation:

$60 * .25 = $15

$60 - $15 = $45

Find the missing side. Round
to the nearest tenth.
17
у
44
Х
x = [?]

Answers

Answer:

The answer for Acellus people is x=12.2

Step-by-step explanation:

The other legs of the right-angle triangle will be 12.23 units and 11.81 units.

What is trigonometry?

The connection between the lengths and angles of a triangular shape is the subject of trigonometry.

The right angle triangle is shown with the angle of 44° and the length of the hypotenuse is 17 units.

Then the measure of the length of x will be given by a cosine angle of 44°.

cos 44° = x / 17

x = 12.23 units

Then the measure of the length of y will be given by a sine angle of 44°.

sin 44° = y / 17

y = 11.81 units

Thus, the other legs of the right-angle triangle will be 12.23 units and 11.81 units.

More about the trigonometry link is given below.

https://brainly.com/question/22698523

#SPJ2


1. The Jordans are shopping for a new vehicle. They are pricing a 4 door
sedan. The base price is listed at $19,500. Factory Installed options total
$1,395. The destination charge is $385. What is the sticker price?
$17,720
$19,885
$20,895
$21,280

Answers

Answer:

21,280

Step-by-step explanation:

Answer:21,280

Step-by-step explanation: because I am smart and I am black BLM and LM and ALL LIVES MATTER

Hailey has $9 worth of nickels.

How many nickels does Hailey have?


180 nickels

90 nickels

36 nickels

20 nickels

Answers

Answer:

180

Step-by-step explanation:

All you would have to do is divide $9 (900) by the worth of a nickel (5) thus the equation would be 900÷5 which equals 180

Find the area of the circle. Round you answer to the nearest hundredth.

Answers

Answer: well first you need to send the picture

Step-by-step explanation:

1. Take the picture

2. Post it to brainly

3. Get your answer

1.Which function value is greater: A(4) or B(4)??

Answers

Step-by-step explanation:

well I thought that it was (B) because it was on where it says population(millions) Number (B) it was on 2 so I think is (B)

There were 63 people sitting in a school auditorium of which 1/7 were teachers, while the rest were students. How many teachers were sitting in the
auditorium?


Answers

Answer:

eat an apple it is good for you and others around you

Answer:

9 teachers were sitting in the auditorium.

Step-by-step explanation:

63 divided by 7 is 9.


The figure is made up of 5 identical quarter circles.
(a) Find the perimeter of the figure.
(b) Find the area of the figure.
(Take π= 3.14.)​

Answers

78.8 and 251.2 is the answer

Help me which one is it ?

Answers

1\8 is the probability flipping a coin three times and getting three heads in a row

Help me out please????

Answers

Answer:

fromfromfromfromfromfromfromfromfromfromfromfromfromfromfromfromfrom

Step-by-step explanation:

hii! help asap. i’ll give brainliest thanks!

Answers

Answer:

A

Step-by-step explanation:

Every object in a state of uniform motion will remain in that state of motion unless an external force acts on it.

Force equals mass times acceleration [ ].

For every action there is an equal and opposite reaction.

Francis has 11 bottles containing 8 ounces of water each. He multiplies to determine that he has 88 ounces of water
total. Which addition equation could he use to check his answer?
O 8 + 11 + 8 + 11 + 8 + 11 + 8 + 11 = 76
O 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 88
O 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 64
O 8 + 11 = 19

Answers

Answer:

aunser is 968

Step-by-step explanation:

because if there is 88 ounces in 11 bottles you have to multiply 88 x 11

What are the vertex and axis of symmetry of the parabola y = x2 + 10x + 30?

Answers

Answer:

x=−5

y=x2+10x+25

Step-by-step explanation:

Because the line of symmetry passes through the vertex, the equation of the line is x=−5.

Which point is located in Quadrant 12 A point P B point o C point OD points​

Answers

C point i think tht rught

Answer

Step-by-step explanation:

yeah um im not really quite sure

how can you apply the basic concept of probability in your life as a student

Answers

Answer:

Easy you can guess if you think you can do something and you proudly can

Step-by-step explanation:

help please! quadratic equation and stretch factor

Answers

Answer:

Equation: f(x)=x²-4x+3

Stretch factor: a=1

Step-by-step explanation:

Notice the x-intercepts are (1,0) and (3,0) which can help us determine the equation by setting their expressions equal to 0 and expanding:

(x-1)(x-3)=0

x²-4x+3=0

Therefore, the equation is f(x)=x²-4x+3 where the stretch factor is a=1

25 POINTS!! Which of the following shows the number 10,000 written as a number having just three significant digits?

A. 1.000 x 10 to the 4rd power
B. 1.00 x 10 to the 4th power
C. 1.0 x 10 to the 4th power
D. 1 x 10 to the 4th power

Answers

Answer:

B. 1.00 x 10 to the 4th power

Step-by-step explanation:

What is the value of x?

Answers

Answer:

5 units (you are right!)

Step-by-step explanation:

The triangles ABD and BCD are similar.

Therefore,

[tex]\frac{x}{10}=\frac{10}{4x} \\4x^{2}=100\\x^{2}=25\\x=5[/tex]

I hope this helped!

a 15 foot tree casts a shadow 20 3/4 feet long at the same time a nearby building casts a shadow 166 feet long, how tall is the building

Answers

Answer: the height of the tree is 27 feet

Step-by-step explanation: We can set up a proportion comparing the height of each object to the length of the shadow.

h s

h 15 = 18

       10

Cross multiply

10 ⋅ h = 18 ⋅ 15

10 h = 270

Use the multiplicative Inverse

10

h

10

=

270

10

h = 27

Justin gets a weekly allowance of $10. What could he do with the money? Select all that
apply.
share $3 with a friend, spend $5 on pet supplies, and save $2
donate $3 to charity, spend $5 on snacks, and save $4
save $6 and keep $4 as spending money
spend $8 at the movie theater and put $5 in his savings account

Answers

Answer:

Step-by-step explanation:

1st one

3rd one  

these both equal or are a little less then 10

Which of the following expressions is equal to 6^4
a. 6 + 6 + 6 + 6 or 24
b. 6 · 4 or 24
c. 4 or or 6 4 · 4 · 4 · 4 · 4 · 4 4, 096
d. 6 · 6 · 6 · 6 or 1, 296

Answers

d is equivalent to 6^4
The answer is D

6^4 is equivalent to 6 x 6 x 6 x 6

Hope this helps :)

What is the maximum height of of Anna's golf ball? The equation is y=x−0.04x^2

Answers

Answer:

a) 69.99

b) .20%

Your welcom ,.

Step-by-step explanation:

Help please helllllp

Answers

Answer:b

Step-by-step explanation:

b

b

b

b

b

Answer:

0 to 6 because the graph shows 6 and 70 has a 0 in it

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