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Ulleksa [173]
3 years ago
11

What are all the prime and composite factors of 45

Mathematics
1 answer:
Helen [10]3 years ago
3 0
I may not know many but here it goes...
1,3,5,9,45


Hope this helped you!
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Robert is writing a paper for language arts class he can write one third of the page in 1/4 of an hour at what rate is Robert wr
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He's writing one paper every 3/4 of an hour

1/3: 15 minutes
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Or, one paper every 45 minutes/ 3/4 of an hour
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Betty bought two bags full of books at an annual library book sale. If she
almond37 [142]

Answer:

12.90= .90+ 2x

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The rectangles garden is 25ft by 15ft what is the area of the garden ?
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I hope this helps you




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At a cookout the cook prepares 25 hot dogs and 16 hamburgers. If the ratio is 25 to 16, the rate can be expressed as 25 hot dogs
victus00 [196]
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7 0
3 years ago
Situation:
Gala2k [10]

Answer:

5.5 days (nearest tenth)

Step-by-step explanation:

<u>Given formula:</u>

\sf N=N_0e^{-kt}

  • \sf N_0 = initial mass (at time t=0)
  • N = mass (at time t)
  • k = a positive constant
  • t = time (in days)

Given values:

  • \sf N_0 = 11 g
  • k = 0.125

Half-life:  The <u>time</u> required for a quantity to reduce to <u>half of its initial value</u>.

To find the time it takes (in days) for the substance to reduce to half of its initial value, substitute the given values into the formula and set N to half of the initial mass, then solve for t:

\begin{aligned}\sf N & = \sf N_0e^{-kt}\\\\\implies \sf \dfrac{11}{2} & = \sf 11e^{-0.125t}\\\\\sf \dfrac{1}{2} & = \sf e^{-0.125t}\\\\\sf \ln \left(\dfrac{1}{2}\right) & = \sf \ln e^{-0.125t\\\\\sf \ln \left(\dfrac{1}{2}\right) & = \sf -0.125t \ln e\\\\\sf \ln \left(\dfrac{1}{2}\right) & = \sf -0.125t(1)\\\sf t & = \sf \dfrac{\ln \left(\dfrac{1}{2}\right)}{-0.125}\\\\\sf t & = \sf 5.545177444...\\\\\sf t & = \sf 5.5\:\:days\:\:(nearest\:tenth)\end{aligned}

Therefore, the substance's half-life is 5.5 days (nearest tenth).

Learn more about solving exponential equations here:

brainly.com/question/28016999

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