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goldfiish [28.3K]
3 years ago
14

What is the value of

alt="\frac{81^4}{3^5}" align="absmiddle" class="latex-formula">? (Express your answer in exponential form.)
Mathematics
1 answer:
IRISSAK [1]3 years ago
5 0

Answer:3^1^1\\

Step-by-step explanation:

\frac{81^4}{3^5}

\frac{3^1^6}{3^5}

The base is same power can be add or subtract

3^1^6^-^5

3^1^1

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A lake polluted by bacteria is treated with an antibacterial chemical. Aftertdays, thenumber N of bacteria per milliliter of wat
jeyben [28]

Answer:

N(1)=50 is a minimum

N(15)=4391.7 is a maximum

Step-by-step explanation:

<u>Extrema values of functions </u>

If the first and second derivative of a function f exists, then f'(a)=0 will produce values for a called critical points. If a is a critical point and f''(a) is negative, then x=a is a local maximum, if f''(a) is positive, then x=a is a local minimum.  

We are given a function (corrected)

N(t) = 20(t^2-lnt^2)+ 30

N(t) = 20(t^2-2lnt)+ 30

(a)

First, we take its derivative

N'(t) = 20(2t-\frac{2}{t})

Solve N'(t)=0

20(2t-\frac{2}{t})=0

Simplifying

2t^2-2=0

Solving for t

t=1\ ,t=-1

Only t=1 belongs to the valid interval 1\leqslant t\leqslant 15

Taking the second derivative

N''(t) = 20(2+\frac{2}{t^2})

Which is always positive, so t=1 is a minimum

(b)

N(1)=20(1^2-2ln1)+ 30

N(1)=50 is a minimum

(c) Since no local maximum can be found, we test for the endpoints. t=1 was already determined as a minimum, we take t=15

(d)

N(15)=20(15^2-2ln15)+ 30

N(15)=4391.7 is a maximum

7 0
3 years ago
Please please please hellllllppp meeeeee !!!!!!!!!
Nezavi [6.7K]
ANSWER: 77
Explanation: Making 88 in 8 minutes means that the machine is making 11 per minute thus being said if the machine worked for 7 minutes it would make 77 pens.
88/8=11
11*7=77
7 0
3 years ago
2. A local baseball stadium has a total of 2,414 seats, with 221 seats reserved for season ticket holders.
kogti [31]
2414 total seats.......221 reserved.....x = non-reserved.....y = remaining seats

y = 2414 - (x + 221)
y = 2414 - x - 221
y = 2193 - x <=====
5 0
3 years ago
The radius of a cylindrical gift box is (2x+3) in. The height of the gift box is twice the radius. What is the surface area of t
inessss [21]
SA=2pir^2+2hpir=2pir(r+h)
h=2r=2(2x+3)=4x+6

SA=2pi(2x+3)(2x+3+4x+6)
SA=(4x+6)(pi)(6x+9)
SA=24πx²+27πx+54π
3 0
3 years ago
5. Solve the following inequality –1 + 6(-1 - 3x) &gt; -39 - 2x.
Stells [14]

Answer:

Step-by-step explanation:

7 0
3 years ago
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