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3 years ago

Explaindon't mind the red

Mathematics

1 answer:

Oduvanchick [21]3 years ago

7 0

12 + h - 5 + h + 20h
= h + h + 20h + 12 -5
= 22h + 7 (Ans: D)

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The half-life of carbon-14 is 5600 years. If a piece of charcoal made from the wood of a tree shows only 66% of the carbon-1

xz_007 [3.2K]

The tree died about 3357 years ago.

Explanation:

The half life of carbon - 14 is given by

$A(t)=A(0)e^{-kt}$

where $A(t)=0.5$

$A(0)=1$

$t=5600$

Substituting these values in the above equation, we get,

$0.5=1e^{-5600k}$

Taking In on both sides of the equation, we get,

$In(0.5)=-5600k$

$\frac{In(0.5)}{-5600} =k$

$0.00012377=k$

Since, only 66% of Carbon - 14 remains after the time T.

Thus, we have,

$0.66=1e^{-kT}$

Taking In on both sides of the equation, we get,

$In(0.66)=-0.00012377 \ T$

$\frac{In(0.66)}{-0.00012377} = T$

$3357=T$

Thus, the tree died about 3357 years ago.

6 0

2 years ago

Consider the following cumulative relative frequency distribution.

bulgar [2K]

Answer:

Step-by-step explanation:

5 0

2 years ago

An isosceles triangle has angle measures 40, 40, and 100. The side across from the 100 angle is 10 inches long. How long are the

Sophie [7]

Answer:

the answer is C- 6.53 inches

Step-by-step explanation:

3 0

2 years ago

2x + 5 = 10

hammer [34]

There are many ways you can start off by solving an equation. In this case, the first operation used in solving this equation would be subtraction. You would have to subtract 5 from each side.

3 0

2 years ago

Read 2 more answers

Help with math please! This is table to linear equation (level 3)

kolbaska11 [484]

Answer:

y = -5x-4

Step-by-step explanation:

start with slope-intercept form:

-9-11/1+3 = -20/4 = -5

your slope is -5

next, do point-slope form:

y+9 = -5(x-1)

y+9 = -5x+5

-9 -9

y = -5x-4

4 0

2 years ago