Please help. Please answer sensibly! I will give brainliest to the correct answers !

Answer:

The artifact was made approximately 13,306 years ago

Step-by-step explanation:

The half-life of Carbon-14 = 5730 years

The formula for radioactive decay is given by the equation:

[tex]N=N_0 e^{- \lambda t}\\where:\\N = Number\ of\ particles\ at\ time\ t\\N_0= Number\ of\ particles\ at\ time\ t_0\\\lambda = decay\ constant = \frac{In}{t_{1/2}} ; t_{1/2} = half-life\\t = time\ in\ years[/tex]

The amount of Carbon-14 left = 20% = 20/100 = 0.2

[tex]\therefore \frac{N}{N_0} = 20 \% = 0.2[/tex]

[tex]N=N_0 e^{- \lambda t}\\\\dividing\ both\ sides\ by\ N_0\\\frac{N}{N_0} = e^{- \lambda t}\\0.2 = e^{- \lambda t}\\taking\ natural\ logarithm\ of\ both\ sides\\In 0.2 = Ine^{- \lambda t}\\In0.2 = -\lambda \times t\\but\ \lambda = \frac{In2}{t_{1/2}} \\\therefore In0.2 = -\lambda \times t\\\\= In0.2 = - \frac{In2}{t_{1/2}} \times t\\where\ t_{1/2} = 5730\ years\\-1.6094 = - \frac{0.6931}{5730} \times t\\-1.6094 = - 0.00012095 \times t\\t = \frac{-1.6094}{-0.00012095} \\t = 13,306.32[/tex]

t ≈ 13,306 years

Answer:

There are 16 left-handed players.

Step-by-step explanation:

Answer:

16

Step-by-step explanation:

Answer:

C: Charles

Step-by-step explanation:

165 miles divided by 6 hours

165/2.5

66 miles in one hour

Answer:

D. (2 x 0,01) + (7 % 0,001)

Answer:

jhghgfg

Step-by-step explanation:

Step-by-step explanation:

Let the equation of the line be y = mx + c

since the line is parallel to y = -1/2x + 1, the two lines have the same gradient.

therefore, m = -1/2

sub (-4, -1):

-1 = -1/2(-4) + c

c = -3

therefore equation of the line is y = -1/2x - 3

This question demands knowledge on coordinate geometry's slope intercept form and finding unknowns. If you would like to venture further, you can check out my Instagram page (learntionary). Thanks!

Answer:

$986.50

Step-by-step explanation:

$750 x 0.07 = $52.50

$52.50 x 4.5 = $236.25

$236.25 + $750 = $986.25

Answer:

$986.25

Step-by-step explanation:

(750 *0.07)*4.5 =

52.59 * 4.5 = 236.25

750 + 236.25 = 986.25

Answer:

Step-by-step explanation:

Answer:which grade are you

Step-by-step explanation:

If you are grade 7 to 9 I know

Answer:

x= 500 y= 1500

Step-by-step explanation:

Isolate x or y in the first equation

Isolating for x would be x= -y+2000

Substitute X=-y+2000 into equation 10x+20y=35000

10(-y+2000)+20y=35000

Exapnd the equation above and you should get y=1500

Same steps for finding x by isloating for y

Answer:

Step-by-step explanation:

Given the equation of the unit price expressed as;

p = 7 + 2q1⁄3, we are to find the value of q when p = 20

20 = 7 + 2q1⁄3

20-7 = 2q/3

13 = 2q/3

Cross multiply

13 * 3 = 2q

39 = 2q

q = 39/2

q = $19.5

Hence the producer surplus is 1950 cents

Answer:

the answer is seven:7

Step-by-step explanation:

i got it right

Answer:

7

Step-by-step explanation:

I took the test before

Answer:

Step-by-step explanation:

Circumference of a circle is expressed as;

C = 2πr

r is the radius of the circle

Given

C = 53.38cm

radius r = 8.5cm

Substitute into the formula to get π

From the formula;

π = C/2r

π = 53.38/2(8.5)

π = 53.38/17

π = 3.14cm

The value of pi is 3.14 cm

Answer:

It's C

Step-by-step explanation:

12 square centimeters

Step-by-step explanation:

You just multiply the length x the width which is just 3 x 4

Answer:

a

Step-by-step explanation:

Answer:

C. The graph does not show a proportional relationship because each point written as a ratio gives a different value.

Step-by-step explanation:

The equation of a line in slope-intercept form is

y = mx + b

Where m is the slope and b is the y-intercept.

Not all lines represent proportional relationships. The condition for a line to be a proportional function is that b=0, i.e., the y-intercept is the origin.

The graph shown in the figure has a y-intercept of 2, thus the line is not a proportional relationship.

If the equation of the line is proportional (b=0), then:

y = mx

Or:

y/x = m

The ratio between each value of y and x must be constant.

This is not the case, because

3/2, 4/4, 6/5 result in different values and 2/0 doesn't even exist. Thus the correct answer is:

C. The graph does not show a proportional relationship because each point written as a ratio gives a different value.

Answers:

the answers are...

1.) equivalent fractions

2.) mixed number

3.) improper fraction

4.) denominator

5.) numerator

6.) proper fraction

look at the screenshot!!

hope this helps :)

Answer:

1. Fractions that may be expressed differently, but still have the same value

→Equivalent fractions

2. Consists of an integer and a proper fraction

→Mixed number

3. A fraction with a numerator that is larger than or equal to the denominator

→Improper fraction

4. The bottom part of a fraction; represents the whole

→Denominator

5. The top part of a fraction; represents part of the whole

→Numerator

6. A fraction with a numerator that is less than the denominator

→Proper fraction

Answer:

2 miles

Step-by-step explanation:

it depends on how many hours per hour but 2 miles would be the average answer.

hope this helps. have a good day. :)

Answer:

14, 8

Step-by-step explanation:

Using the formulas

A= Length * Width (lw)

P=2(l+w)

l+w)

There are 2 solutions forl

l=P

4+1

4P2﹣16A=44

4+1

4·442﹣16·112=14in

l=P

4﹣1

4P2﹣16A=44

4﹣1

4·442﹣16·112=8in

Answer:

D.

Step-by-step explanation:

Recall that the limit definition of a derivative at a point is:

[tex]\displaystyle{\frac{d}{dx}[f(a)]= f'(a) = \lim_{x \to a}\frac{f(x)-f(a)}{x-a}}[/tex]

Hence, if we let f be ln(x + 1) and a be 1, this yields:

[tex]\displaystyle f'(1)= \lim_{x \to 1}\frac{\ln(x+1)-\ln(2)}{x-1}}[/tex]

Hence, the limit is equivalent to the derivative of f at x = 1 or f’(1).

In conclusion, our answer is D.

Answer:

2 3/4 Gallons

Step-by-step explanation:

4 1/2-1 3/4= 2 3/4

Convert 4 1/2 to 4 2/4 then subtract and you will get 2 3/4

Answer:

c

Step-by-step explanation:

,

Answer:

The Answer is C

Step-by-step explanation:

Answer:

why have so many tabs lol

Step-by-step explanation:

Answer:

Liz did

Step-by-step explanation:

because if you multiply 47 to 2, then you get 94 and that's higher than 92, not sure but i hope this works

Answer:

5.25

Step-by-step explanation:

Given that,

On Wednesday, a farmer picked 1 16/31 baskets of peppers. On Thursday, the farmer picked 2 10/21 baskets. On Friday, the farmer picked 1 5/19 baskets.

To find,

How many baskets of peppers did the farmer pick.

Solution,

It can be calculated by adding all the baskets of peppers on Wednesday, Thursday and Friday as follows :

[tex]P=1\dfrac{16}{31}+2\dfrac{10}{21}+1\dfrac{5}{19}\\\\=\dfrac{47}{31}+\dfrac{52}{21}+\dfrac{24}{19}\\\\=5.25[/tex]

So, he will pick 5.25 baskets of peppers.

Answer:

the common factor of 54 and 66 is 6

Step-by-step explanation:

Answer:

I think it would be 6.

Step-by-step explanation:

I googled it.

Answer:

1 Solution

Step-by-step explanation:

Answer:

[tex] x = 17.5 [/tex]

Step-by-step explanation:

Since the two triangles are similar, their corresponding side lengths would be proportional. Therefore:

[tex] \frac{28}{16} = \frac{x}{10} [/tex]

Cross multiply

[tex] x*16 = 10*28 [/tex]

[tex] 16x = 280 [/tex]

Divide both sides by 16

[tex] x = \frac{280}{16} [/tex]

[tex] x = 17.5 [/tex]

Answer:

7y+5z+10

Step-by-step explanation:

7y+5z+10

Answer:

B.

Step-by-step explanation:

2y + 4y + y = 7y

7z + (-2z) = 5z

8 + 2 = 10