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TEA [102]
4 years ago
14

I just need to find y explain please :p

Mathematics
1 answer:
QveST [7]4 years ago
7 0
Rewrite in slope intercept from y=mx+b  y=1-3x+11/3
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Please help!!quickly
kap26 [50]
Cos A = adjacent/hypotenuse
= 10/26
4 0
3 years ago
2/5 divided by 12/49
Lostsunrise [7]

Answer:

Exact Form: 49/30

Decimal Form: 1.6 line over 3

Mixed Number Form: 1 19/30

Step-by-step explanation:

I hope this helps!!!! Have a great day!!!

5 0
4 years ago
Read 2 more answers
8 1/2 X 3 1/3 plz I need help for class
mixas84 [53]

Answer:

use a calculator

Step-by-step explanation:

also if this is easier change 1/2 and 1/3 to 0.5 and 0.3 where it would be 8.5 x 3.3

5 0
4 years ago
How do you find the scientific notation of:<br> 29,678,900,522?
OlgaM077 [116]
2.9678900522•10 (to the 10th power)
8 0
3 years ago
An important tool in archeological research is radiocarbon dating, developed by the American chemist Willard F. Libby.3 This is
gavmur [86]

(a) Assuming that Q satisfies the differential equation Q' = -rQ, determine the decay constant r for carbon-14. (b) Find an expression for Q(t) at any time t, if Q(0) = Qo. (c) Suppose that certain remains are discovered in which the current residual amount of carbon-14 is 20% of the original amount. Determine the age of these remains.

Answer:

a) r = (In 2)/(t1/2) = (In 2)/5730 = 0.000121/year

b) Q(t) = Q₀ (e^-rt)

c) Are of the 20% remnant of Carbon-14 = 13301.14 years.

Step-by-step explanation:

Q' = -rQ

Q' = dQ/dt

dQ/dt = -rQ

dQ/Q = -rdt

Integrating the left hand side from Q₀ to Q₀/2 and the right hand side from 0 to t1/2 (half life, t1/2 = 5730 years)

In ((Q₀/2)/Q₀) = -r(t1/2)

In (1/2) = -r(t1/2)

In 2 = r(t1/2)

r = (In 2)/(t1/2) = (In 2)/5730 = 0.000121 /year

b) Q' = -rQ

Q' = dQ/dt

dQ/dt = -rQ

dQ/Q = -rdt

Integrating the left hand side from Q₀ to Q(t) and the right hand side from 0 to t.

In (Q(t)/Q₀) = -rt

Q(t)/Q₀ = e^(-rt)

Q(t) = Q₀ (e^-rt)

c) Q(t) = Q₀ (e^-rt)

Q(t) = 0.2Q₀, t = ? and r = 0.000121/year

0.2Q₀ = Q₀ (e^-rt)

0.2 = e^-rt

In 0.2 = -rt

-1.6094 = - 0.000121 × t

t = 1.6094/0.000121 = 13301.14 years.

Hope this Helps!

5 0
3 years ago
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