Help me out please please an thank you

Answers

Answer 1

The answer to you q is c

Related Questions

A sample of a radioactive isotope had an initial mass of 540 mg in
the year 2009 and decays exponentially over time. A measurement
in the year 2011 found that the sample's mass had decayed to 300
mg. What would be the expected mass of the sample in the year
2021, to the nearest whole number?

Answers

Answer:

16 mg

Step-by-step explanation:

[tex]N_0[/tex] = Initial mass of sample = 540 mg

t = Time taken = 2 years

[tex]t_{1/2}[/tex] = Half life of isotope

N = Final mass of sample = 300 mg

Radioactive decay is given by

[tex]N=N_0e^{-\dfrac{\ln 2}{t_{1/2}}t}\\\Rightarrow \ln\dfrac{N}{N_0}=-\dfrac{\ln 2}{t_{1/2}}t\\\Rightarrow t_{1/2}=-\dfrac{\ln2}{\ln\dfrac{N}{N_0}}t\\\Rightarrow t_{1/2}=-\dfrac{\ln2}{\ln\dfrac{300}{540}}2\\\Rightarrow t_{1/2}=2.358\ \text{years}[/tex]

In 2021 the number of years passed from 2009 would be 12 years

[tex]N=N_0e^{-\dfrac{\ln 2}{t_{1/2}}t}\\\Rightarrow N=540e^{-\dfrac{\ln 2}{2.358}12}\\\Rightarrow N=15.86\approx 16\ \text{mg}[/tex]

The expected mass of the sample in the year 2021 would be 16 mg.

Gabrielle's age is three times Mikhail's age. The sum of their ages is 68 . What is Mikhail's age?

Answers

Answer:

Step-by-step explanation:

3x + x=68

68: 4= 17

Mikhail is 17

A bathtub is filling with water at a rate of 60 liters per minute.
How many liters of water are in the bathtub after t minutes?

Answers

60t is your answer

Have a good day

*WILL MARK BRAINLIEST*
simplify the irrational number square root of 45, then estimate it to two decimal places.

Answers

Answer:

3[tex]\sqrt{5}[/tex] which is approx 6.71

Step-by-step explanation:

[tex]\sqrt{45}[/tex] = [tex]\sqrt{9}[/tex]·[tex]\sqrt{5}[/tex] = 3[tex]\sqrt{5}[/tex]

Manny goes bowling.
• He has $25.00 to spend.
• He spends $4.25 to rent shoes.
• He spends $2.50 for each game he bowls.
Which inequality can Manny use to determine x, the greatest number of games he can bowl?
A 2.5 + 4.25% > 25
B 4.25 +2.52 > 25
C 2.5 +4.25.0 < 25
D 4.25 +2.52 < 25

Answers

Answer:4.25 + 2.50 equal< 25.00 Step-by-step explanation:We are given the details of Manny's expenses when he went bowling.We have the following;Shoe rental = 4.25 Charge per game = 2.50Total amount to spend = 25.00This shows that Manny can spend the total sum of 25 and nothing more. Therefore all that he can spend at the game is either less than, or equal to 25. Also, he pays to rent bowling shoes at the rate of 4.25. he only needs to pay this once. After that he can pay 2.50 per game. We do not know how many games he can afford from his total amount of 25.00. However, the total number of games is represented by x. This means for every game he plays, the charge is;2.50xThis means, if he played 2 games, that would be 2.50 times 2, and so on. Take note that he also paid 4.25 for shoes which means for x number of games, Manny would be paying;4.25 + 2.50xTherefore, for the total amount of money he has, Manny would be having;4.25 + 2.50 equal< 25.00 Take note that we do not know how many games this total amount can cover (that is, value of x). However we do know that he cannot spend more than the sum of 25.00. Therefore the inequality that determines the greatest number of games he can bowl is;4.25 + 2.50 equal< 25.00

alguien me ayuda??

lo necesito hoy :ccccc ☕

Answers

Answer:

no se entiende la imagen

Answer:

La A

Step-by-step explanation:

Mentira no se ve nada solo escoge la D de Dios

HELP URGENT DUE IN 5 MINUTES URGENT PLEASE

Answers

The answer is C

x - 2y = 4
-x -x
-2y = 4 - x (divide that by 2)

Y = 1/2x - 2

A circle has a diameter of 12 inches. What is the area of the circle? А 367 inches squared B 247 inches squared C 127 inches squared D 67 inches squared

Answers

Answer:

113.1

Step-by-step explanation:

A = πr²

A = π (6)²

A = π (36)

A = 113.09 = 113.1

Solve the linear system of equations

3x+2y=7
-3x+4y=5

X=
Y=

Answers

Answer :
X= 1 , Y = 2

Step-by-step explanation :

3912 divided by 48!!!!!!!!! Pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeee

Answers

Answer:

81.5

Step-by-step explanation:

Answer:

81.5

Step-by-step explanation:

Hope this Helps!

x-7=13
one step equation

Answers

Answer:

x=20

Step-by-step explanation:

Answer:

x=20

Step-by-step explanation:

Add 7 to both sides, x = 13+7 = 20

PLEASE HELP ILL GIVE YOU BRAINLIIEST

The common ratio of a geometric sequence is 3 and the 8th term is 4,374. What is the 4th term in this sequence?

Answers

Answer:

the first term is a1

the 8th term is a8

the 4th term is a4

we have:

[tex]a8=a1.3^{7}\\\\<=>4374=a1.3^{7}\\\\<=>a1=2[/tex]

with a1 = 0,002 => a4 = a1.3³ = 2.27 =54

Step-by-step explanation:

The 4th term of the given geometric sequence is 54.

What is geometrical progression series?

A geometric progression is a sequence in which any element after the first is obtained by multiplying the previous element by a constant which is called a common ratio denoted by r.

For example, the sequence 1, 4, 16, 64,… is a geometric sequence with a common ratio of r = 4.

The nth term of a GP is given as a[tex]r^{n-1}[/tex]

As per the given,

Common ratio r = 3

8th term = 4374

a(3)⁸⁻¹ = 4374

a = 2

The 4th term will be as, 2 x (3)⁴⁻¹ = 54

Hence "The 4th term of the given geometric sequence is 54".

For more information about the geometrical progression,

brainly.com/question/4853032

#SPJ5

eqfrtvwetsbhsrtzdvcsrtbdhv

Answers

Answer:

ERSEYHEFUHEFYUBREHFBHRBVYICRWHBG

Step-by-step explanation:

25 POINTS!!! BRAINLIEST!!!!

Which statements when combined describe a sequence that would show △ABC ∼ △A'B'C'?

A) A reflection across the x-axis.

B) A reflection across the line x = 6.

C) A dilation from the origin of △ABC by a scale factor 3.

D) A dilation from the origin of △ABC by a scale factor 1/3.

E) A translation of the dilated image of △ABC one unit right and four units down.

Answers

Think I just did this test

I'll add the other pic too'

How would u solve for x
8x-2=-9+7x

Answers

8x - 7x = -9 + 2
x = -7

step 1: move the terms
8x-7x = -9+2
step 2: calculate
8x-7x= x
-9+2= -7
so, x= -7. hope this helps!

From her yearly salary of $193,837, Alina spent a total of $102,938 on rent, bills, and personal items. About how much did she save?

Note: The values of salary and the total expense must be rounded off to the nearest thousand before estimation.

Answers

Answer:

92,000i think this is the answer

16. If x and y are positive integers such that the greatest
common factor of xy2 and xy” is 50, then which of
the following could equal y ?
F. 50
G. 25
H. 10
J. 5
K. 2

Answers

I think it will be 50 so that means is f

plz i need help i don't understand it

Answers

Answer:

y=5,2 and -3

we have to put the values of X and then solve the equation.

Have a good day

Y=2-x

X=-3 the y is -1

x=0 the y is 2

x=5 the y is -3

Hope this helps ;)

The points represented by the (x, y) coordinate pairs all lie on line "k". These are the points: (1,3), (2, 1), (3,-1). (4.-3), and (5,-5). What is the slope of line k? A.2 B.5 C.-3 D.-2

Answers

Answer:a

Step-by-step explanation:

Bsnanna

If the points (1,3), (2, 1), (3,-1). (4.-3) lie on line k, then the slope of line k is -2

Option D is the correct choice

The points that lie on the line k are:

(1,3), (2, 1), (3,-1). (4.-3), and (5,-5).

We can find the slope of the line k by picking any two points on the line

The slope m of a line passing through the points (x₁, y₁) and (x₂, y₂) is given by the formula:

[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]

On the line k, let us select the points (1,3) and (2, 1)

x₁ = 1, y₁ = 3, x₂ = 2, y₂ = 1

[tex]m = \frac{1-3}{2-1} \\\\m= \frac{-2}{1}\\\\m= -2[/tex]

Therefore, the slope of the line k is -2

Learn more here: https://brainly.com/question/21770234

last question please get it right
Which shape has two sets of parallel sides only?

rhombus
rectangle
parallelogram
quadrilateral

Answers

Answer:

Rectangle

Step-by-step explanation:

1 up and down and one side to side that makes two. Hope this helps!! Good Luck!!! :) :) :) :)

Please help with this look below! : )

Answers

Answer:

$0.40

Step-by-step explanation:

5.60/14 = .40

Solve h + 8 = -8
H= ?

Answers

You subtract 8 from both sides.

h = -16

h+8= -8

h=-8-8

h=(-16)

Hope it helps. Please mark brainliest.

Rhianna dog sat for 213 hours after school every day for 5 days. How many total hours did Rhianna dog sit?

Answers

Answer:

1065 hours

Step-by-step explanation:

well all you gotta do is multiply 5x 213

15 POINTS!!!!
What is the difference (2 x - 3) - (x - 1)
A. x - 4
B. x - 2
C. x + 2
D. x + 4

Answers

Answer:

The answer is B. (x-2)

Step-by-step explanation:

First simplify the equation (2x-3)-(x-1)

=(2x-3)-x+1

=(2x+3)-x-1

=2x-3-x-1

=x-2

It should be x-4 when you get rid of the parenthesis 2x-1=x and -3-1=-4

Help help help help !!!!

Answers

Answer:

A.188.4cm^3

Step-by-step explanation:

3.14 times 4 times 15

It’s A. 188.4cm3, good luck (*・∀-)☆.

Candace makes a sugar-water mixture for hummingbirds. She knows the amount of sugar used in the mixture is proportional to the amount of water used.

Which of the following could represent the relationship between the amount of sugar and water Candace should use in the mixture?

Answers

Answer:

the first image (the image with the upward sloping line)

Step-by-step explanation:

If the amount of sugar used in the mixture is proportional to the amount of water used, as more water is used, the more sugar is used. So, as more water is used, more sugar is used.

If the amount of water used is constant regardless of the amount of sugar, the appropriate graph would be the second graph. the graph with the straight line

$9.45 meal, 20% tip does answer know the answer

Answers

Answer: $7.56

Step-by-step explanation:

1.89 I think LOL but don’t quote me

Pair of integers whose sum is -5

Answers

-10, 5 or -6, 1 or -15, 10

Write the measure in descending order 0.5m - 480mm - 55cm

Answers

Answer:

480mm<55cm<0.5m

Step-by-step explanation:

millimeters means 100

centimeters means 10

meters means 1

there are 10mm in every 1cm and 100cm in every 1m

Answer:

55cm>0.5m>480mm

Step-by-step explanation:

as we know

1000mm=1m

100cm=1m

So we see

55=55cm

0.50=50cm

480=48cm

Hope it helps you thanks

Please mark as The Brainlist

Thank you

A forest covers 73,000 acres. A survey finds that 0.2% of the forest is old-growth trees. How many
acres of old-growth trees are there?
There are acres of old-growth trees.
Type an integer or a decimal)

Answers

Answer:

143 acres.

Step-by-step explanation:

To find how many acres of old-growth trees there are, we need to find what 0.2% of 73,000 is.

To find a percent of a number, multiply the percent by the number.

0.2% is equal to 0.002.

73,000 x 0.002 = 143

So, 143 acres of the forest is old-growth trees.

I would appreciate brainliest, if not that's ok!

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