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hammer [34]
2 years ago
9

Please help with this question

Mathematics
1 answer:
alekssr [168]2 years ago
8 0

Step-by-step explanation:

so, that means we want to find the time t (days) after which N = No/2

because "half-life" means the amount of time until half of the substance has disappeared (or transformed into something else).

so, we have

No/2 = No × e^(-0.1481×t)

No = 2× No × e^(-0.1481×t)

1 = 2×e^(‐0.1481×t)

1/2 = 0.5 = e^(-0.1481×t)

ln(0.5) = -0.1481×t

t = ln(0.5)/-0.1481 = 4.680264555... ≈ 4.7 days

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Can someone pls explain to me how to do this (^。^)
34kurt

Answer:

Area: \frac{8}{15} feet²

Perimeter: \frac{44}{15} =2 \frac{14}{15} feet

Step-by-step explanation:

The <u>formula of finding the </u><u>area</u><u> of a rectangle</u> or square is <u>width multiplied by length</u>.

The <u>formula of find the </u><u>perimeter</u><u> of a rectangle</u> or square is <u>width+width+length+length</u>

Area: \frac{4}{5} *\frac{2}{3} = \frac{8}{15} feet²

Perimeter:

\frac{4}{5} +\frac{4}{5} +\frac{2}{3} +\frac{2}{3} =

\\\\\frac{12}{15} +\frac{12}{15} +\frac{10}{15} +\frac{10}{15} =\\\\\frac{24}{15} +\frac{20}{15} =\\

\frac{44}{15} =2 \frac{14}{15}

4 0
3 years ago
Evaluate 8w - 2p if w = 6 and p = -5
zysi [14]

Known facts

  • w = 6
  • p = -5

8w - 2p = 8(6) - 2(-5) = 48 + 10 = 58

Answer: 58

Hope that helps!

4 0
2 years ago
Read 2 more answers
I need to know how I got number 27 because I can’t remember what I did
krok68 [10]
B=75, not 27
Sorry, I had to use a napkin because I was too lazy to get a paper....let me know if u need me to explain anything

4 0
3 years ago
a lamp post cast a Shadow 15 feet long while a 6 foot man standing nearby cast a shadow 5 ft long. what proportion can be used t
kolezko [41]

Answer:

6/5=x/15

Step-by-step explanation:

6/5=x/15,where x is hight of the lamp post

x=18

3 0
3 years ago
I’m not asking for much :(
Vinvika [58]

Answer:

c

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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