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Reptile [31]
3 years ago
7

ILL MARK YOU AS BRAINLIEST, RATE YOU A 5, AND THANK YOU! 70 POINTS!

Mathematics
2 answers:
posledela3 years ago
6 0

Answer: 290 in.^2

Step-by-step explanation: Just did on iready. Hope i helped! (:

nadya68 [22]3 years ago
4 0

Answer:

<h2>290 in²</h2>

Step-by-step explanation:

From the net:

S.A. = 2(25 in²) + 4(60 in²) = 50 in² + 240 in² = 290 in²

From the model:

The formula of a Surface Area of a rectangular prism:

S.A. = 2(lw + lh + wh)

l - length

w - width

h - height

We have l = 5 in, w = 5 in, and h = 12 in. Substitute:

S.A. = 2(5 · 5 + 5 · 12 + 5 · 12) = 2(25 + 60 + 60) = 2(145) = 290 in²

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A certain virus is dying off at a rate of 18% per hour. Initially there were
djyliett [7]

Answer:

3 strain would still alive after 48 hours

Step-by-step explanation:

Initial population of virus = 40000 grams

A certain virus is dying off at a rate of 18% per hour.

We are supposed to find  how much of the  strain would still be alive after 48 hours

Formula : N(t)=N_0(1-r)^t

N_0=Initial population

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r = rate of decrease = 18% = 0.18

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So,the  strain would still be alive after 48 hours=40000(1-0.18)^{48}=2.91 \sim 3

Hence 3 strain would still alive after 48 hours

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3 years ago
3(x+3)-5x simplify<br> Answer
Lelu [443]

Answer: -2x + 9

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Next, subtract the variable x: 3x+9-5x      (3x-5x=-2x

The answer is -2x+9

7 0
2 years ago
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gizmo_the_mogwai [7]

Answer:

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Answer:

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andrew-mc [135]
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