1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Norma-Jean [14]
2 years ago
6

Symplify the expression 3⁴÷3⁹. Select all that apply.​

Mathematics
2 answers:
Kamila [148]2 years ago
6 0

Answer:

C and D

Step-by-step explanation:

When you divide exponents with the same base, you just subtract the exponents.

3^4 / 3^9

4-9 = -5

3^-5

That can be rewritten into 1/3^5 and 1/243.

LenKa [72]2 years ago
3 0

Answer: answer is C and D when dividing exponents you subtract and with negatives you turn it into a fraction

Step-by-step explanation:

You might be interested in
Para las celebraciones del barrio de Santiago se junto cierta cantidad de dinero que se distribuirá de la siguiente forma:?
givi [52]

Answer:

4,767

Step-by-step explanation:

6 0
2 years ago
Line segment AB is dilated to create line segment A’B’ using point Q as the center of dilation what is the scale factor
Alex777 [14]

Answer:

2

Step-by-step explanation:

We are given the distance QA=1.25 and QA'=2.5.

We make the relation 2.5/1.25=2 is the scale factor!

5 0
3 years ago
A cyclist has rode his bike 174 miles in 3 hours. If he continues at this rate, how long would it take him to complete another 4
In-s [12.5K]

Answer:

7 hours

Step-by-step explanation:

174/3 is 58 miles per hour so 406/58 is 7 hours

6 0
3 years ago
What divides a line segment into two congruent segments?
Nutka1998 [239]

Answer:

segment bisector

Step-by-step explanation:

Too cut in half, think bisect.

So we are talking about a segment, so segment bisector

3 0
3 years ago
A 1000-liter (L) tank contains 500 L of water with a salt concentration of 10 g/L. Water with a salt concentration of 50 g/L flo
djverab [1.8K]

Answer:

a) y(t)=50000-49990e^{\frac{-2t}{25}}

b) 31690.7 g/L

Step-by-step explanation:

By definition, we have that the change rate of salt in the tank is \frac{dy}{dt}=R_{i}-R_{o}, where R_{i} is the rate of salt entering and R_{o} is the rate of salt going outside.

Then we have, R_{i}=80\frac{L}{min}*50\frac{g}{L}=4000\frac{g}{min}, and

R_{o}=40\frac{L}{min}*\frac{y}{500} \frac{g}{L}=\frac{2y}{25}\frac{g}{min}

So we obtain.  \frac{dy}{dt}=4000-\frac{2y}{25}, then

\frac{dy}{dt}+\frac{2y}{25}=4000, and using the integrating factor e^{\int {\frac{2}{25}} \, dt=e^{\frac{2t}{25}, therefore  (\frac{dy }{dt}+\frac{2y}{25}}=4000)e^{\frac{2t}{25}, we get   \frac{d}{dt}(y*e^{\frac{2t}{25}})= 4000 e^{\frac{2t}{25}, after integrating both sides y*e^{\frac{2t}{25}}= 50000 e^{\frac{2t}{25}}+C, therefore y(t)= 50000 +Ce^{\frac{-2t}{25}}, to find C we know that the tank initially contains a salt concentration of 10 g/L, that means the initial conditions y(0)=10, so 10= 50000+Ce^{\frac{-0*2}{25}}

10=50000+C\\C=10-50000=-49990

Finally we can write an expression for the amount of salt in the tank at any time t, it is y(t)=50000-49990e^{\frac{-2t}{25}}

b) The tank will overflow due Rin>Rout, at a rate of 80 L/min-40L/min=40L/min, due we have 500 L to overflow \frac{500L}{40L/min} =\frac{25}{2} min=t, so we can evualuate the expression of a) y(25/2)=50000-49990e^{\frac{-2}{25}\frac{25}{2}}=50000-49990e^{-1}=31690.7, is the salt concentration when the tank overflows

4 0
3 years ago
Other questions:
  • Suppose the cost of publishing x books is C(x) = 10000 + 25<img src="https://tex.z-dn.net/?f=%5Csqrt%7Bx%7D" id="TexFormula1" ti
    8·1 answer
  • What’s the answer ??? And the last option is 55 it got cropped out
    11·1 answer
  • What is 11,499 to the nearest thousand
    11·2 answers
  • Rashid spent $31.84 on gas for his car. Gas was $1.99 per gallon. How many gallons did Rashid purchase?
    8·1 answer
  • What are the factors of 21
    10·1 answer
  • An English class has read the first 384 pages of their novel.
    13·1 answer
  • 20 x 10 3 but the 3 is small please i need this ...
    8·2 answers
  • What is the volume of the cone
    10·2 answers
  • Ralph receive money from his family members for his graduation. He decides he wants to spent no more than $120 on movies to brin
    15·1 answer
  • Find (f/g)(x). <br> f(x)=sqrtx^2-1<br> g(x)=sqrtx-1<br> (hurry plz its timed lol)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!