At the beginning of an experiment, there are 400 grams of contaminants. Each hour, three-fourths of the contaminants are filtered out.


Use the model to calculate the number of contaminants after the third hour of the experiment.

the answer is not 168.75 cause that is how much filtered/went away. I need to know how much is left after it was filtered.

Answers

Answer 1

Answer:

18.75

Step-by-step explanation:

first hour: 400×(1/4) = 100

second hour: 100×(1/4) = 25

third hour: 25×(1/4) = 18.75

but i have to give credit to the first answerer, this is not my answer, though i know how to do it i dont know how to explain it properly.


Related Questions

Find the area of the trapezoid

Answers

Answer:

16 cm²

Step-by-step explanation:


The diagram shows a square ABCD.
D
N
bu
A
M
I
Mis the midpoint of AB.
Nis the midpoint of AD.
The area of the shaded triangle AMN is 18 cm
Work out the area of triangle MCN.

Answers

Answer:The diagram shows a square ABCD.

D

N

bu

A

M

I

Mis the midpoint of AB.

Nis the midpoint of AD.

The area of the shaded triangle AMN is 18 cm

Work out the area of triangle MCN.

5b is the area of MCN

Step-by-step explanation:

The ages, in years, of Sharice’s family members are shown. What is the mean absolute deviation of the data set?
2, 5, 18, 20, 31, 45, 76, 54, 34, 82

Answers

Answer:Statistics Calculator: Mean Absolute Deviation (MAD). Use this calculator to compute the mean absolute deviation from a data set. Data is from: ... Values must be numeric and may be separated by commas, spaces or new-line. Press the ..

Step-by-step explanation:

Answer:

the answer is 14

Step-by-step explanation:

Otis had a salad for $4.50, a sandwich for $6.25, and a drink at his favorite restaurant. The tax for the entire meal was $0.54. What was the price of the drink. Meal tax 4.5%

Answers

Answer:

1.25

Step-by-step explanation:

Answer:

wrong

Step-by-step explanation:

1.250 is the correct answer

Maya has 6 1/8 yards of cloth. If she uses 3 1/4 yards to make a skirt, how many yards will she have left

Answers

Answer:
6 1/8 - 3 2/8 = 2 7/8

How I Found The Answer:

6 + 1/8 - 3 - 2/8

6 - 3 = 3

1/8 - 2/8 = -1/8

3 - 1/8 = 2 7/8

FOUNTAINS The circular fountain in
front of the courthouse has a radius of
9.4 feet. What is the circumference of
the fountain? Round to the nearest
tenth.

Answers

Answer:

The fountain has a circumference of 9 feet.

Step-by-step explanation:

5 and above get rounded to the next tenth and 4 and below rounds to the nearest 10 also and that would be 9 if it was 9.5 or above the answer would have been 10.0

The ratio of exterior angle and interior angle of a regular polygon is 12:6. The name of the regular polygon is

Answers

Answer:

Equilateral triangle

Step-by-step explanation:

sum the parts of the ratio, 12 + 6 = 18 parts

exterior angle + interior angle = 180°

180° ÷ 18 = 10° ← value of 1 part of the ratio , then

6 parts = 6 × 10° = 60° ← interior angle

12 parts = 12 × 10° = 120° ← exterior angle

The sum of the exterior angles of a polygon = 360°

Divide 360° by 120° to find number of sides

360° ÷ 120° = 3

and since the interior angles are 60° , then

polygon is an equilateral triangle

f(x)= (x+2)2
f(x)=a (x-h)2+k
find : vertex, domain,range,axis of symetery , up/down, min/max , graph

Answers

f(x) = (x + 2)²    ⇒   f(x) = (x - (-2))² + 0    ⇒   h = -2 ,   k = 0

vertex:   (-2, 0)

domain:    R  

range:   <0, ∞)

axis of symetery:  x = -2

up   {a=1>0}

min:  f(-2) = 0

graph:  {f(0)=4}

Which net represents this triangular prism?​

Answers

Answer:

The top right one.

Hope this helps :)

-12x + 2 y = 8
-6x + y = -3

Answers

Answer:

PEMDAS

Step-by-step explanation:

USE PEMDAS

A small cone has a diameter of 6 cm and a height of 7 cm. A large cone has a diameter of 12 cm and a height of 9 cm. What is the approximate difference in the volumes of the two cones?

Answers

Answer:

the answer should be 273 cm^3

Step-by-step explanation:

1-A student studies math for 1 5/7 hours and science for 3 1/19 hours over the weekend. How much time, in hours, did this student study for math and science altogether?

2-A metal alloy is made by mixing 99/17 ounce of Metal A with with 3/11 pound of Metal B. What is the total weight of the alloy in pounds?

3-A baker mixes 3.1 ounces of butter with 227.6 grams of flour. What is the total weight of the mixture in grams?

4-A carpet cleaner charges $0.99 per square foot to clean carpet. In the next house he is going to clean, the client reveals a perfectly circular carpeted room. If the room measures 45 feet in diameter, how much will he charge?

Answers

Answer:

1. [tex]4\frac{102}{133}[/tex]

2. [tex]6\frac{18}{187}[/tex]

3. 230.7

4. $1,574.53

good luck, i hope this helps :)

What is the polynomial in standard form?

Answers

That’s the answer ❤️❤️❤️Hope that helps!!!
Answer: I hope this helps!!

Explanation:

What is 0.66% of 9,500 is

Answers

Answer:

62.7

Step-by-step explanation:

Answer:

62.7%

Step-by-step explanation:

how many ounces are in 6 1/4 pounds(show your work)

Answers

Answer:

100 oz

Step-by-step explanation:

to find out how many ounces in a quarter pound, multiply 16 by ... 1/8 lb = 2 oz; 1/4 lb = 4 oz; 1/3 lb = 5.33 oz; 1/2 lb = 8 oz; 1 lb = 16 oz; 1.5 lb

Answer:

100 ounces

Step-by-step explanation:

there are 16 oz in a pound, so, 6 x 16 = 96 oz. And in 1/4 lbs there are 4 oz, so, when you add that to 96, it equals 100 oz.

100 Ponits give away to answer the question.


Which relationship describes angles 1 and 2?





adjacent angles


complementary angles


supplementary angles


vertical angles

Two parallel horizontal lines intersected by an angled line with one labeling the top left angle and two labeling the bottom right angle of the top line

Answers

Answer:

vertical angles

Step-by-step explanation:

How many solutions does the equation 2(x+1) = 2x+1 have?

Answers

Answer:

No Solutions

Explanation:

2(x + 1) = 2x + 1

Simplify both sides of the equation

2(x + 1) = 2x + 1

(2)(x) + (2)(1) = 2x + 1 [Distribute]

2x + 2 = 2x + 1Subtract 2x from both sides

2x + 2 − 2x = 2x + 1 − 2x

2 = 1

Subtract 2 from both sides

2 − 2 = 1 − 2

0 = −1

This Is False, Therefore There Are No Solutions

- PNW

What is 7/8% as a decimal

Answers

Answer: 0.875

Explanation: For example, to convert the fraction 7/8 to a decimal using a calculator, simply perform 7 divided by 8 and press enter. The resulting decimal would be 0.875.

HELP I WILL MARK THE BRAINLIEST ANSWER

Answers

Answer:

D. 225 square units

Step-by-step explanation:

Multiply 2.5 by the scale factor of 6.

2.5 * 6 = 15

Then because it is a square, multiply 15*15

15 * 15 = 225

The answer is 225

Answer:

D

Step-by-step explanation:

The side length of the new square = 6 × 2.5 = 15 then its area

A = 15² = 225 units² → D

(-9) / *fill the blank* = 5

Answers

Answer:-1.8

Step-by-step explanation:

I need the points bro

Classify the number -3 into as many categories as it belongs: Natural number, whole number, integer, or rational number.

Answers

-3 is an integer and a rational number.


Natural numbers and while numbers refer to positive numbers, so -3 cannot be either of those.

What is the solution to the system of equations y = -1/2 x + 1 and y = 2x + 6?

Answers

Answer:

Since by the 2nd equation, we know that y is the same as 6-x, we can substitute that for y in the first equation:

y = 2x + 3 -> 6 - x = 2x + 3 -> 6 = 3x + 3 -> 3 = 3x -< x = 1 and by either of the two equations, that derives y = 5

Step-by-step explanation:

Answer:

ok you can use subsitution for this one

since y=2x+6

subsitute 2x+6 for y

3x-(2x+6)=6

3x-2x-6=6

add like terms

x-6=6

add 6 to both sides

x=12

subsitute

y=2x+6

y=2(12)+6

y=24+6

y=30

x=12

y=30

(x,y)

(12,30)

Step-by-step explanation:

The value of a yacht was £230 000.
The yacht depreciated by 12% each year.
Work out it’s value after 3 years, to the nearest £100.

Answers

£156,210 would be the answer

Answer:

88/100 x 230000=202400

88/100 x 202400=178112

88/100 x 178112=156,738.56

Ans) Pounds 156,700

Step-by-step explanation:

7,12,13,14,15,14,19,14,13,10,11,7,18,20,14,16,14,18,13

find the median?​

Answers

Answer:

14

Step-by-step explanation:

its 14 because its listed more then once i mean so is 13 but 14 is listed 6 times and 13 is listed 3 times

so there for your answer is 14

what is 30x65 -3x12 874x34

Answers

Answer:

DB!

Step-by-step explanation:

30x65-3x12 = 1914

874x34 = 29716

Hope I helped! Click the !

The correct answer is 29,716

Go step by step to reduce the radical.

Answers

Answer:

Step-by-step explanation:

You can begin by breaking down √(160) into its prime factors.

160 = 2 * 2 * 2 * 2 * 2 * 5

√(160) = √(2 * 2 * 2 * 2 *2 * 5)

This can be broken down further by

2 * 2√2 * 5

For every 2 factors that are the same, take one outside the brackets

4 √10

I suppose the way you are supposed to write this is √16 * √10

I'm not sure I'm right. There are 2 square root signs there and it is the only way I can think of to use 2 square root signs.

Help this is due in 30 mins
The graph shows the amount of money you and your brother are saving for a trip to a water park.
Your brother saves $----- less than you each week.

Answers

Answer:

you save $90 each week your brother save $71 each week.

so your answer would be your brother saves $19 less than you each week

A jersey cow weighs 900 pounds, she drops 782. What percent of weight has she lost?

Answers

Answer:

20 percentll

Step-by-step explanation:

Activity: Find three different single digit numbers that
multiply together to give 120.

Answers

Answer:

Step-by-step explanation:

5,4,6

5×4=20 and 20×6=120

???????????????????????????????

Answers

Answer:

i think its A

Step-by-step explanation:

you add all the numbers up together and dvide by how many numbers there are. thats what i did and got 6

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