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bearhunter [10]

2 years ago

14

I need help with number 7 and 8 and 9!

1 answer:

ELEN [110]2 years ago

7 0

Answer:

in the 8 is ADB, in the 7 I'm not sure about you need to do sorry, or maybe you need to classify what triangle it is think is a scalene triangle because has a different measurements

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Free points, please solve -2m+36=2(6m-3)?

Elan Coil [88]

Answer:

$\Huge \boxed{m=3}$

Step-by-step explanation:

$-2m+36=2(6m-3)$

Expanding brackets.

$-2m+36=12m-6$

Adding 2m and 6 to both sides.

$36+6=12m+2m$

Combining like terms.

$42=14m$

Dividing both sides by 14.

$3=m$

8 0

3 years ago

Read 2 more answers

A bone fragment has 67% of the parent Pb-210 remaining. The half-life of Pb-210 is 22 years. How old is the bone fragment?

Korolek [52]

To solve this question we will use two important formulas.

The first formula involves the calculation of the decay constant, $k$ which is to be found as:

$k=\frac{0.6931}{T_{\frac{1}{2}}}$

where $T_{\frac{1}{2}}$ is the half life of Pb-210 which is given to be 22 years in the question.

Thus, $k=\frac{0.6931}{22}\approx0.0315$

Now, we will use the second formula which is called the function of decay formula and is given as:

$N = N_{0} e^{-kt}$

where $N$ percentage of Pb-210 remaining in the bone at present, which in our case is 67% or 0.67

$N_{0}$ percentage of Pb-210 to start with, which is always 100% or 1.

Plugging in all these values in the decay formula we are supposed to find the time, $t$ .

$0.67=1\times e^{-0.0315t}$

Taking natural log on both sides we get:

$ln(0.67)=-0.0315t$

$\approx-0.4005=-0.0315t$

$\therefore t=\frac{0.4005}{0.0315}$

$t\approx12.71$ years

Therefore the bone fragment is about 12.71 years old.

7 0

4 years ago

Write an expression to describe a rule for a sequence. Then find the 100th term in the sequence

rjkz [21]

Its adding 8 each time

100th term is 805

8 0

3 years ago

BEST ANSWER GETS EXTRA POINTS

Amanda [17]

Answer:

Solution given:

6-4x<26

Subtracting both side by 6

-4x<26-6

-4x=20

dividing both side by -4

we get

x=20/-4

<u>x=-5</u>

5 0

3 years ago

Read 2 more answers

oil is leaking out of a tank. the depth of oil in the tank for 60 seconds is shown below. use the graph to work out the rate of

FrozenT [24]

Answer:

Step-by-step explanation:

draw a tangent starting from (0,80) and touches at (10,60)... Example attached if needed... Good Luck! ;)

3 0

4 years ago