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3 years ago

What’s 22-25? Plz help!

Mathematics

2 answers:

marysya [2.9K]3 years ago

4 0

Answer:

-3

Step-by-step explanation:

When putting the smaller number in front of the bigger number your answer will be negative. I hoped I helped :)

jeyben [28]3 years ago

3 0

Answer:

Step-by-step explanation:

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A sample of tritium-3 decayed to 94.5% of its original amount after a year.

Zolol [24]

(a) If $y(t)$ is the mass after $t$ days and $y(0) = A$ then $y(t) = Ae^{kt}.$

$y(1) = Ae^k = 0.945A \implies e^k = 0.945 \implies k = \ln 0.945$

$\text{Then } Ae^{(\ln 0.945)t} = \frac{1}{2}A\ \Leftrightarrow\ \ln e^{(\ln 0.945)t} = \ln \frac{1}{2}\ \Leftrightarrow\ ( \ln 0.945) t = \ln \frac{1}{2} \Leftrightarrow \\ \\
t = - \frac{\ln 5}{\ln 0.945} \approx 12.25 \text{ years}$

(b)
$Ae^{(\ln 0.945) t} = 0.20 A \ \Leftrightarrow\ (\ln 0.945) t \ln \frac{1}{5}\ \implies \\ \\
t = - \frac{\ln 5}{\ln 0.945} \approx 28.45\text{ years}$

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3 years ago

18000 decrease by 15% every year for 3 years

kati45 [8]

1st year= 18000 x 0.85 = 15300
2nd year= 15300 x 0.85 = 13005
3rd year= 13005 x 0.85= 11054.25

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3 years ago

Which type of triangle has 2 angles that measures 45?

dlinn [17]

Answer: it's obtuse. Yep

Step-by-step explanation:

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What is f(0)?<br> Idk what this is help

d1i1m1o1n [39]

Answer:

The answer is 1.

Step-by-step explanation:

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3 years ago

What is the value of the tangent of

kiruha [24]

Answer:

Step-by-step explanation:

With reference < H

perpendicular (p) = 12

base (b) = 5

so now

tangent of < H

= p / b

= 12 / 5

hope it helps :)

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3 years ago

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