The radioactive isotope 14C has a half-life of approximately 5715 years. A piece of ancient charcoal contains only 81% as much of the radioactive carbon as a piece of modern charcoal. How long ago was the tree burned to make the ancient charcoal

Answer:

Step-by-step explanation:

I gave you the answer earlier too!

for more info !

Which means the 3rd side of the triangle is equal to 1/2 of the line drawn by joining the mid points

which means

2x-4 = 1/2×21

thus, 2(2x-4) =21

=> 4x-8 = 21

4x = 29

♡ Answer ♡

G) 1/12

♡ Step-by-step explanation ♡

  In order to figure out this problem, we have to take a few relatively simple steps.

  First, we must count the total number of coins in the cash register. Do not change the value of these coins. Simply take the numbers listed in the problem and add them up. Your process for completing this step should look something like this: 10+11+13+6 equals 40. With this being said, there are 40 coins in the cash register.

  Next, we must remember the values of the two coins the question is asking for: pennies and dimes. Keep in mind that, out of all 40 coins, 10 of them are pennies and 13 of them are dimes.

  Then, we write the fractions used to find the answer to this problem. In the question, the cashier (hypothetically) draws a penny first, and then a dime. This means a penny is drawn before a dime is drawn. (Although it seems like a miniscule detail, this knowledge is actually something extremely important to remember. This small piece of information can actually change the entire answer if not used properly.)

  In this problem, the cashier would choose a single penny out of the 10 in contrast to the total 40 coins. Since there are 10 pennies overall, and 40 coins overall, the probability of choosing a penny first is 10/40.

  After we complete the probability of choosing a penny before all else, we must find the probability of choosing a dime after choosing a penny. Since the dime will be chosen after the penny is chosen, one coin will be gone: the chosen penny. So, the total amount of coins within the cash register changes (or more specifically decreases (by 1)) from 40 to 39. However, the amount of dimes, 13, stays the same. With this information in mind, we can write a fraction of 13/39 for the probability of choosing a dime after choosing a penny.

  Finally, now that we have both probability fractions, we can figure out the answer to the question. In order to do this, we multiply and simplify both fractions. 10/40*13/39 is 130/1560. 130 ÷ 130 is 1. 1560 ÷ 130 is 12. 1 ÷ 12 can also be written as 1/12. Therefore, the answer to this problem is G) 1/12.

(The paragraph and author's note below are technically optional thought processes and information, but read them if you wish. Although I would recommend reading further, considering another way to solve the question is mentioned, it is entirely you (the reader's) choice.)

  You can also check this answer through the other/alternate way of solving this problem: by simplifying both probability fractions before you multiply them. 10/40 can be simplified to 1/4. 13/39 can be simplified to 1/3. After doing this, we multiply both simplified probability fractions in order to find, or in this case check, the answer. 1/4*1/3 is 1/12. 1/12 is the same fraction as the one present in choice G. This is the same answer as the one we previously got. This enforces the idea that G) 1/12 is indeed the answer to this question.

  A/N (Author's Note): Although it took quite a while to jot down, this was truly a blast to write and explain! I hope this helped those that needed/wanted it. Have a wonderful week reader(s)!

Answer:

I'm pretty sure it's already simplified.

Step-by-step explanation:

there is no equal sign or x=

Answer:

7.785

Step-by-step explanation:

William and Jill together is 3.114 so just times that by 2.5 and your good

Answer:

7.785 lbs

Step-by-step explanation:

add 2.35 and .764 then multiply by 2.5

Answer:

y= 3x + 6

Step-by-step explanation:

y = mx + b

m = slope

b= y intercept

so the equation is y= 3x + 6

Hope this helps, if so please mark brainlist, peace and love

a) Another name for plane Z is LN plane.

b) PHJ and M are distinct points that are collinear.

c) N and K are distinct points that are coplanar.

d) HL and HK are distinct lines that intersect

a) The common point in lines LN and PN  is N and it is the intersection point.

b) Any three non-collinear locations inside a plane can be used to give it a name. Points H, J, and K cannot be combined because an unlimited number of planes cross through them. Think about the flat piece of paper rotating about this axis (like a propeller). We can only build one specific plane if the points are not all along the same line.

I'll choose P, H, and J as the non-collinear points to give the object the name Plane PHJ. There may be other solutions.

c) Because they are on the same line, points H, J, and K are collinear. Fill up the answer box by selecting either H or K. I'll choose point K.

d) Line HK and point P are parallel. Both of them are present on the same flat piece of paper or on the same flat plane.

That flat plane can be compared to the surface of the earth, but point N is located underneath. Therefore, the ground plane and point N wouldn't be coplanar.

Learn more about colinear lines here:

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Answer:

$520

Step-by-step explanation:

If it was 25% off  and she saved 130

then 130 is the 25%

130*4 = 520

.5(4*11) - .5(2*3)

22- 3= 19

i didn't get any of the answers you put i got 19

Answer:this did not work for me

Step-by-step explanation:

Answer:

1

Step-by-step explanation: anything raised to zero is one

Answer:

1

Step-by-step explanation:

anything to the power of zero is equal to 1

Hope this helps!      :3

plz mark as brainliest!

Answer:

1100

Step-by-step explanation:

Answer:

35 and 15

Step-by-step explanation:

7+3=10

50÷10=5 so you multiply each number by five

7×5=35

and

3×5=15

Step-by-step explanation:

let the number be 7x &3x

now,

7x+3x= 50

10x=50

x=50

10

x=5

again,

7x=7×5 = 35

3x= 3×5 =15

therefore the two number are 35 & 15.

hope it helps.

Answer:

total answer is a 34.

Step-by-step explanation:

4444

4444

4444

4444=18

333

333

333=12

22

22=4

Total is 34.

Answer:

answer is 96

Step-by-step explanation:

MARK ME AS THE BRAINLIEST

Answer:

I will try doing it

Step-by-step explanation:

which are the questions

=============================================================

Explanation:

I recommend drawing out the number line. Plot -16 and 14 on it.

Either count out the spaces, or subtract and apply absolute value, to find the distance from -16 to 14 is exactly 30 spaces.

----------

Or you can think of it like this:

From -16 to 0 is 16 spaces

From 0 to 14 is another 14 spaces

That's 16+14 = 30 spaces total.

----------

In short, segment CD is 30 units long.

Point E is somewhere on segment CD.

x = distance from E to C

y = distance from E to D

x+y = EC+ED = CD = 30

x+y = 30

y = 30-x

We're told the distance from E to C is 1/4 the distance from E to D, so,

x = (1/4)*y

x = (1/4)*(30-x)

x = 0.25*(30-x)

x = 7.5 - 0.25x

x+0.25x = 7.5

1.25x = 7.5

x = (7.5)/(1.25)

x = 6

The distance from E to C is 6 units.

This means we'll add 6 units to the location of point C to find out where to place E

E = C+6 = -16+6 = -10 is the final answer

2x³ + 5x² - x - 6 is the simplified product of (2x) (x2) + (2x)(x) + (2x)(-2) + (3)(x2) + (3)(x) + (3)(-2).

A three-term algebraic expression is referred to as a trinomial. Variables and constants of one or more terms make up an algebraic expression. These expressions separate words or phrases using symbols or operations like +, -,×, and ÷.

This algebraic phrase includes a trinomial as well as a monomial, binomial, and polynomial. Let's learn more about trinomials, how to factor them, and the formula for doing so while also solving some problems.

It is expressed as

x² + xz + 1

A simplified product will be an equation where we will take all the same variables as common variables.

⇒ (2x)(x²) + (2x)(x) + (2x)(-2) + (3)(x²) + (3)(x) + (3)(-2)

⇒ 2x³ + 2x² -4x +3x² + 3x -6

⇒ 2x³ + 5x² - x - 6

Learn more about trinomials

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Answer:

m<4 = 44°

Step-by-step explanation:

m<8 = 34°

m<9 = 40°

m<3 = 62°

m<2 = 34° + 40° (exterior angle theorem of a triangle)

m<2 = 74°

m<3 + m<4 + m<2 = 180° (sum of ∆)

62° + m<4 + 74° = 180° (substitution)

m<4 + 136° = 180°

m<4 = 180 - 136 (substitution property of equality)

m<4 = 44°

Answer:

0.857 miles in 1 hour

Step-by-step explanation:

It is given that,

A crew of highway workers paved 12 mile in 14 hour.

We need to find how much will they pave in 1 hour if they work at the same rate.

14 hours = 12 miles

To find how much they pave in 1 hour, we must divide 12 by 14 as follows :

[tex]1\ \text{hour}=\dfrac{12}{14}\ \text{miles}\\\\=0.857\ \text{miles}[/tex]

Hence, they pave 0.857 miles in 1 hour.0.857 miles in 1 hour.

Answer:

77 centimeters = 2.52625 feet

Step-by-step explanation:

Hope this helps!      :3

plz mark as brainliest!

Answer:

[tex]CF<BC<BF[/tex]

Step-by-step explanation:

[tex]As\ we\ know\ that,\\The\ longest\ side\ in\ a\ triangle\ is\ the\ side\ opposite\ to\ the\ largest\ angle.\\Here\ in\ \triangle BCF,\\\angle B=52\\\angle C=65\\\angle F=63 [Angle\ Sum\ Property\ Of\ A\ Triangle]\\Hence,\\As\ we\ can\ observe\ that\ \angle C\ is\ the\ largest\ followed\ be\ \angle\ F\ and\ \angle B. \\BF\ is\ the\ longest side\ followed\ by\ BC\ and\ CF.\\Hence, \\BF>BC>CF\\Or,\\CF<BC<BF[/tex]

Answer:

There will be 18 grams left after 12 hours.

Step-by-step explanation:

Half-life is the amount of time it take for a cell to turn from one condition to another.

To find the amount of grams for the first 6 hours.

72 ÷ 2= 36

Now, since 6 x 2 = 12, we need to divide 36 by 2 to find the next half-life.

36 ÷ 2 = 18

Therefore, there will be 18 grams left after 12 hours.

Hope this helps! :D

Answer:

it is c and d

Step-by-step explanation:

if he pays his friend 10 out of the 30 he has 20 left, then he repays his sister half of what get gets from each lawn, therfore he gives her 10 each lawn, the rest is self explanitory

Answer: 24%

Step-by-step explanation:

45 is the total number of occurrences, and 6 different occurrences round it off to 8 being the closest to 25% thus that's how I figured out 24

Answer:

-5c + 15d - 5

Step-by-step explanation:

1. Distribute the -5 from outside the paranthesis to the inside.

2. Keep in mind the negative signs when you're distributing.

Answer:

-5c + 15d - 5

Step-by-step explanation:

= (-5)(c + -3d + 1)

= (-5)(c) + (-5)(-3d) + (-5)(1)

= -5c + 15d - 5

Answer:

Step-by-step explanation:

3/5 x 100%

60%

Answer:60%

Step-by-step explanation: All percents are out of 100 so do 100 divided by the denominator. 100 divided by 5 is 20 so multiple 3 by 20 and you get 60/100= 60%

Answer:

Oy=2x+3

Step-by-step explanation:

The function that has the {y} - intercept as that of the function graphed is y = 2x + 3

A function is a relation between a dependent and independent variable. We can write the examples of functions as -

y = f(x) = ax + b

y = f(x, y, z) = ax + by + cz

Given is to find the linear function that has the same y-intercept as the one that is represented by the graph.

The function graphed has the {y} - intercept of 3.

For the functions given -

Functions              {y} - intercept

y=2x-4                        -4

y=2x-3.                       -3

y=2x+3                        3

y=2x+4                        4

So, the function that has the {y} - intercept of 3 is y = 2x + 3.

Therefore, the function that has the {y} - intercept as that of the function graphed is y = 2x + 3.

To solve more questions on functions, visit the link below-

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Answer:A

Step-by-step explanation:

The answer would be only A

Answer:

only A,good luck on your assignment