Mathematics High School

A scientist is testing a new antibiotic on some bacteria she discovers the the antibiotic kills half of the Bactria every hour if she starts with 42000 bacteria what equation can be used to predict the number of bacteria after x hours
a). y= 42000(2)^x
b). y=42000(1/2)^x
c). y=42000(1.5)^x
d). y=(42000/2)^x

Answers

Answer 1
D because if you add all the bacteria and then you subtract and multiply than divide you get B

Related Questions

expand the following: -7(3y-1)

Answers

Answer:

-21y+7

Step-by-step explanation:

-7(3y-1) = 3y(-7) -1(-7) = -21y+7

Answer:

-21y + 7

Step-by-step explanation:

Just times - 7 with 3y then - 7 times with - 1

A business named Beyond Boxes is considering adding a box in the shape of a triangular prism as shown.
5 cm
4 cm
8 cm
3 cm
How much cardboard will be needed to make this design?
A. 108 cm2
B. 96 cm
C. 76 cm?
D. 102 cm

Answers

Answer:

creo que es 4cm y la otra B no se por que esta en ingles ok

Can some please help with this? :)

Answers

Answer:

Step-by-step explanation:

The stuff that is yellow is the answer!

LMNP is a rectangle. Find the value of x and the length of each diagonal.
LN = 7x- 10 and MP = 4x + 3

Answers

Answer:

69=33

Step-by-step explanation:

33ni

what is the quotient of −1 and y

Answers

Answer:

-1/y

Step-by-step explanation:

This quotient is the result when you divide y into -1:  -1/y

What is the slope of the line that passes through the points (1, -9)
and (-2,-4)?

Answers

Answer:

y = -5/3x - 22/3

Step-by-step explanation:

M = -5/3

Plz help I have to turn it it by midnight!!!!!

Answers

Step-by-step explanation:

The perimeter of a polygon is the sum of all of the polygon's sides. Here, a rectangle has 4 sides:

Perimeter of Rectangle

= 2 + (4x - 3) + 2 + (4x - 3)

= (8x - 2)cm.

Answer: 8x-2 cm

Step-by-step explanation:

To find the perimeter of the rectangle, add the length of all sides together.

-----------------------------------------------------------------------------------------------------

Given

(2)+(4x-3)+(2)+(4x-3)

Expand parenthesis

2+4x-3+2+4x-3

Put like terms together

(4x+4x)+(2-3+2-3)

Combine like terms

8x-2

Hope this helps!! :)

Please let me know if you have any questions

A rectangular field measures 400yds x 600yds. Find the length of the diagonal of the field.

Answers

That would be 1000 yards - add the both together

Bus A and Bus B leave the bus depot at 6 pm. Bus A takes 20 minutes to complete its route once and bus B takes 45 minutes to complete its route once. If both buses continue to repeat their route, at what time will they be back at the bus depot together? Assume the buses have no breaks in between routes. Give your answer as a 12-hour clock time

Answers

Bus Bs route times will be:

45 mins
90 mins
135 mins
180 mins

Bus As times will be:

20 mins
40 mins
60 mins
...
180 mins.

Therefore 180 mins is the common factor, which is 9pm

I need Help badly please help

Answers

Answer:

Its a

Step-by-step explanation:

Answer:

n = 72

Step-by-step explanation:

Multiply both sides of the equation by  8

[tex]8*\frac{n}{8}=8*9[/tex]

Simplify/Solve.

[tex]n=72[/tex]

hope this helps :)

WIIL MARk BRAINLIST owoo

Answers

Step-by-step explanation:

Given

f(x) = - x² - 9x - 7

f(3) = -( 3) ² - 9 * 3 - 7

= - 9 - 27 - 7

= -43

Hope it will help :)

Plug in 3 for x.
f(3) = -(3)^2 - 9(3) - 7
f(3) = -43

please help and thanks!

Answers

Answer:    D: 17.3

Step-by-step explanation:

I believe its D because the house and the ground is a 90 degree angle, and at 60 degree angle is a 20 foot ladder. alright then 90 plus 60 = 150 degrees.

then add the twenty foot ladder with each choice for the answer:

A: 20 + 6.1 = 26.1

B: 20 + 10.0 = 30

C: 20 + 14.1 = 34.1

D: 20 + 17.3 = 37.3

The answer would be D because it is the closer number to 150. Because it says " which is the closest height up the house the ladder reaches?" The answer is D the closest number. I HOPE THIS HELPS YOU! =D

Help please :) Karim's mass changed by -4 1/2 last month. Max's mass changed by -6 6/7 last month. Which person matches each description?

Answers

Answer:

Max,Karim

Step-by-step explanation:

Answer:

Max, Max

Step-by-step explanation:

I got it right on Khan Academy

:>

how do you do this? its a 5 mark question​

Answers

You multiply both the sides and the top and add them

Answer:

336

Step-by-step explanation:

12*28

the legend of s u c c

Answers

Huh.....................

Doobs please helpp, mah hw is too hard :,(, the question is: add the polynomial expressions using the horizontal format

Answers

Answer:

9s^3 + 13s

Step-by-step explanation:

Combine like terms and simplify.

(6s^3 + 3s^3) + (9s + 4s) + (10 - 10)

(9s^3) + (13s)

9s^3 + 13s

Ben earns $12,800 a year. About 15% is taken out for taxes. How much is taken out for taxes?

Answers

The answer is about $1920. If it’s rounded, then it’s about $1900 or $2000, depends on which number you round to.

Answer:

$1920

Step-by-step explanation:

to find a percent of a number, divide the percent by 100 then multiply by the value:

Please someone help me

Answers

Answer: C
Explanation:

0.15-> 15%
0.25-> 25%

15%+25%=40%

e =
=
5e + 3f = -36
-e + 2f = 2
f = 1

Answers

Answer:

e = -6

f = -2

Step-by-step explanation:

I used the elimination method and multiplied the second equation by 5 to get:

  -5e + 10f = 10.  Added this to:

+  5e + 3f = -36

13f = -26

f = -2

now find e:  -e - 4 = 2

-e = 6

e = -6

This urgent can y’all please help me with this math problem I’ll mark y’all Brainlyist

Answers

The answer to the question is c
The answer is to this is C

Please help me with this for brainliest.....

Answers

Answer:

a=542

Step-by-step explanation:

you welcome have a good day

Answer:

the answer will be a=524

Step-by-step explanation:

What are the X and Y intercepts of the line in the graph?

Write the equation of the line in slope-inetrcept form

Answers

Answer:

Y-int: (0,3)

X-int: (4,0)

Equation: y = -3/4x + 3

Step-by-step explanation:

One hundred deer were released into a wildlife preserve. The population of deer over a certain number of years is shown.


What degree polynomial could be used to model these data?

Answers

Answer:

Quartic

Step-by-step explanation:

The missing dataset showing the population of deer is shown below:

[tex]\text{Time (years) \ \ \ \ 0 \ \ \ \ 0.5 \ \ \ \ 1 \ \ \ \ 1.5 \ \ \ \ 2 \ \ \ \ 2.5 \ \ \ \ 3 \ \ \ \ 3.5 \ \ \ \ 4}[/tex]

[tex]\text{Population \ \ \ 100 \ \ \ 111 \ \ \ 144 \ \ \ 193 \ \ \ 252 \ \ \ 309\ \ \ 352\ \ \ 363 \ \ \ 324}[/tex]

The degree of polynomial best suitable to model the above dataset is Quartic

[tex]\text{Quartic is an algebraic equation or function of the fourth degree }[/tex]

The polynomial model of the above data is:

P(x) = -2x⁴ + 46x² + 100

Answer:

Quartic

Step-by-step explanation:

Subdivided by the degre

what is a colon
help!!!​

Answers

Answer:

:

Step-by-step explanation:

If I am understanding you correctly, a colon is this

:

The colon is the symbol ":". It is used in a number of different ways in mathematics. 1. To denote ratio or odds, as in 2:1 (voiced "two to one").

Hope this helps :)

CX can be written in the form pa + qb
where p and q are fractions in terms of n.
c) (1) What is the value of p?
(i) What is the value of q?
(1)
m
(1)
i need help with c

Answers

Answer:

Step-by-step explanation:

CX can be written in the form pa + qb

where p and q are fractions in terms of n.

c) (1) What is the value of p?

(i) What is the value of q?

(1)

m

(1)

i need help with c

pls I need help now............Carlos is at the grocery store shopping for oranges. 4 pounds of oranges costs $3.25. When he returns home, he realizes that he actually needed to buy 9 pounds of oranges. He plans to return to the store to buy more oranges so that in total he has 9 pounds.

Answers

Answer:

4.0625

Step-by-step explanation:

All you have to do is divide 3.25 from 4 which will give you 0.8125.

Knowing that you need 5 pounds only. you mulitiply 5 from 0.8125 which gives you the 4.0625

A linear relationship that is proportional goes through the ?

Answers

Answer:

origin

Step-by-step explanation:

A directly proportional linear relationship will always go through the origin (0,0).

Answer:

it goes throught the origin.

Step-by-step explanation:

A non-proportional graph is a straight line that does not go through the origin.

The area of a square having length 1 cm =
mm.​

Answers

Answer:

100mm

Step-by-step explanation:

the answer is 100mm.

What are the other two representations of this ratio 15 to 3

Answers

Answer:

you can answer it like 15 to 3 or

15:3

Isn’t It like 15:3 Ion Kno I’m not sure

Pleasee helppp answer correctly !!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!!

Answers

Answer:

(4,7)

Step-by-step explanation:

Other Questions
how many mililiters is 0.55 L Jose decides to go to the local amusement park. He pays $12.50 for an admission ticket and $4.50 per ride. The total amount that Jose pays for admission and rides is $ 71. Which equation can be used to determine the total number of rides, r, that Jose went on? PLEASE HELPWrite a method that takes two rectangles and returns the (positive) difference between their areas.This method must be named areaDiff() and have 2 Rectangle parameters. This method must return a double.For example suppose two Rectangle objects were initialized as shown:Rectangle rect1 = new Rectangle(2.0, 8.0);Rectangle rect2 = new Rectangle(6.0, 3.0);The method call areaDiff(rect1, rect2) should then return the value 2.0. 1.24 mole of Cl2= ?molecules The diagram shows the forces acting on a cart.Which statement correctly describes the motion of the cart at this point in time?A) The velocity is remaining constant because forces F1 and F2 are balanced, and both of these two equal forces are perpendicular to the velocity.B) The speed of the cart is increasing because forces F1 and F2 are balanced, and both of these two equal forces are perpendicular to the velocity.C) The speed of the cart is decreasing because forces F4 and F3 are unbalanced, and the greater of the two forces is acting in the opposite direction of the velocity.D) The direction of the velocity is changing because forces F4 and F3 are unbalanced, and the greater of the two forces is acting in the opposite direction of the velocity. Help me pls pls pls What is the Protestant Reformation? The perioda) when the Catholic Church tried to fix many of its internal problems.b) when some Christians chose to leave the Catholic Church and start new Christian denominations.c) when the Christian religion split into Roman Catholic and Eastern Orthodox. Why was perspective ignored during the Dark and Middle Ages? NEED THIS ASAP Ill mark brainliest on the best answer The author, Robert Cormier, reveals a great deal about Mike in this story, but he doesnt tell us why Mike shaves off his moustache. Based on events in the story, why do you think he shaved? Provide evidence from the text to support your response. pleaseee help it's due tonight and i don't know what it wants and how to do it Which of the following best describes Steinbeck's attitude toward landowners in The Grapes of Wrath?A. He was impressed by how many types of Fruit they were able to grow. B. He admired their ability to succeed during the Great Depression.C. He was outraged at the suffering their greed caused.D. He was forgiving of them for pushing the tenant farmers off the land. Select the sentence that shows an adjective used as a subject complement.The candle is in the gray cupboard.The candle is fragrant. Solve for x.2x + 9 = 33x = 7.5x = 12x = 21x = 84 2/3 5/9 LCD and equivalent fractions Judge Karen Lee was tried and convicted ofstealing earrings from the mall. She received afine and 10 days in jail.The situation illustrated in the above involves applying which of thefundamental principles? What is unique about the metal mercury? A toll road company has two plans for customers. One plan charges $10 per month for rental of a transponder (a box that identifies your car on the toll roads) plus $0.60 per mile driven. The second plan does not require that you rent a transponder. Instead, it charges customers $0.75 per mile driven on the toll road. Find the minimum number of miles you would need to drive in a month to make the first deal a better deal. what is the ratio 100:120 in it's simplest form? how many miles will a person run an 800 km race? Rob is saving to buy a new MP3 player. For every $11 he earns babysitting, he save $5. On Saturday, Rob earned $33 babysitting. How much money did he save?