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yuradex [85]
3 years ago
5

Can anyone help me with part C?

Mathematics
1 answer:
finlep [7]3 years ago
3 0

Answer:430

Step-by-step explanation:78 times 3 is 430

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a 23 gram sample of a substance thats a by-product of fireworks has a K-value of .13. whats the substances half life in days
nata0808 [166]
Given:
Initial mass, m₀ = 23 g
Decay constant, k = 0.13

Exponential decay obeys the equation
m(t)=m_{0} e^{-kt}
where t = time, days

For half life, the mass is m = m₀/2.
Therefore
e^{-0.13t} = \frac{1}{2} \\ -0.13t = ln(0.5)\\t= \frac{ln(0.5)}{-0.13} =5.33

Answer: The half life is 5.33 days
3 0
3 years ago
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What is the value of y in the equation 2(3y + 6 + 3) = 196 − 16?
Vlad [161]
The answer is 27, I had it on a test.
6 0
3 years ago
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What would be the midpoint of a line segment with endpoints at (0,1)<br> and <br>(5,7) ?​
liubo4ka [24]

Answer:

(2.5, 4 )

Step-by-step explanation:

Using the midpoint formula

Given endpoints (x₁, y₁ ) and (x₂, y₂ ), then midpoint is

[0.5(x₁ + x₂ ), 0.5(y₁ + y₂ ) ]

Given

(0, 1) and (5, 7), then

midpoint = [ 0.5(0 + 5), 0.5(1 + 7) ] = (0.5(5), 0.5(8)) = (2.5, 4)

5 0
3 years ago
Terri and Donna both sell crafts at two different craft shows each weekend. Terri is charged a 5% commission on the amount of mo
harina [27]

Answer:

T   = 0.05x + 35

D  = 0.03x + 55

Step-by-step explanation:

i) On the last weekend in November both Terri and Donna earned from sales the amount of x.

ii) Terri pays the amount T = 0.05x + 35

iii) Donna pays the amount D  = 0.03x + 55

5 0
3 years ago
Find the sum<br> 1/7 + 2/5
AlladinOne [14]

Answer:

Step-by-step explanation:

To add efficiently, you would need to have a common denominator. in this case the least common denominator (LCD) would be 35. 1/7 = 5/35 and 2/5 = 14/35

add the numerators together to get your answer:

19/35

8 0
2 years ago
Read 2 more answers
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