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
pshichka [43]
3 years ago
9

The expression below represents the number of bacteria in a petri dish after t hours. Interpret the meaning of the expression.

Mathematics
1 answer:
konstantin123 [22]3 years ago
3 0

The answer is B) The initial number of bacteria is 57, and the growth rate is 31% per hour.


The expression shown is an <em>exponential expression</em>.  An exponential expression usually takes the form ab^{x}, as this one does.  A represents the <em>initial value</em>, in this case-the initial number of bacteria.  B represents the <em>growth rate</em>.  When it is an increasing growth rate, it will begin with 1, because it will have everything it had before, plus the percent increase, the decimal portion.  In this case, a=57, and b=0.31.


Hope this makes sense!

You might be interested in
(5ab-4a-8)-(9ab-5) its an online geometry class,please help!i provided you 10 pts
Bumek [7]
(5ab-4a-8)-(9ab-5)
Ok just remember that the minus sign before the (9ab-5) is like a minus 1 so it changes the sign inside the bracket...
>>5ab-4a-8-9ab+5
>>-4ab-4a-3
I'm guessing you just have to leave it like that unless there are other parts to the question or whatever but that's that simplified as far as it can be!
7 0
3 years ago
Suppose a call center receives 4000 calls on average during their Friday evening shift. Next Friday several people have put in f
luda_lava [24]

Answer:

The probability that the center will have enough employees to handle this call volume is 0.2764

Step-by-step explanation:

Probability is defined as the ratio of favorable outcomes to the total number of outcomes.

Here the total mean expected number of outcomes=u = 4000

The favorable  expected outcomes are = x= 22* 178= 3916

The  standard deviation= σ= 5

The random variable X =178 has normal distribution with mean 4000/22 and standard deviation 5

So z= x-u/σ

Z= (3916-4000)/22/5

z= -0.764

From the table of areas under normal curve

P (  x= 3916)=  P( -0.764 ≤ Z≤ 0)

P (  x= 3916)=  0.2764

The probability that the center will have enough employees to handle this call volume is 0.2764

3 0
3 years ago
at the sea park, one section in the stadium has 9 rows with 18 seats in each row. in the centre of each of the first 6 rows, 8 s
bonufazy [111]
10 seats are nonsplash zone

18-8=10 because there are 18 total seats and 8 splash zone seats just subtract them Hope this helped :)
7 0
3 years ago
Read 2 more answers
(5m 2 - 2m + 1)(3m - 4)
nirvana33 [79]
15m ^3 - 26m^2 +11m - 4 is the result of the product.

(5m^2 -2m +1)(3m-4)
On opening the bracket, we multiply the terms,
= 15m^3 -6m^2 +3m -20m^2+8m -4
= 15m ^3 - 26m^2 +11m - 4
This is the result of the product
When we mutiply the two equations.
4 0
3 years ago
Solve for each system of equations by substitution or elimination.
Tems11 [23]

QUESTION 1

The given system of equations are:

y=x^2+5x+1

y=x^2+2x+1

We equate the two equations to get:

x^2+5x+1 =x^2+2x+1

x^2 -  {x}^{2} + 5x  - 2x = 1 - 1

3x = 0

x = 0

When x=0,

y=0^2+2(0)+1 = 1

The solution is (0,1)

QUESTION 2

The given equations are:

y=x^2-2x - 1

and

y= -x^2-2x-1

We equate both equations to get:

x^2-2x - 1 = -x^2-2x-1

Group similar terms,

x^2 +  {x}^{2} -2x  + 2x= -1 + 1

2 {x}^{2}  = 0

x = 0

We put x=0 into any of the equations to find y.

y= -0^2-2(0)-1 =  - 1

The solution is (0,-1).

QUESTION 3

The given equations are:

y=x^2+2x+1

and

y=x^2+2x-1

We equate both equations:

x^2+2x+1 = x^2+2x-1

Group similar terms:

x^2 -x^2+2x = -1 - 1

0 =  -2

This is not true.

Hence the system has no solution.

6 0
3 years ago
Other questions:
  • What is the distance between points S and T?
    12·2 answers
  • For every 4 basketballs, there are 5<br> baseballs
    8·1 answer
  • What is the slope of the line perpendicular to y=-7/4x
    6·2 answers
  • A company’s stock decreased from $15 per share to $9 per share. What is the percentage decreased in stock price? Round your answ
    15·1 answer
  • What is the the union for the following sets.
    8·1 answer
  • The taxiFair in Gotham city is $2.40 for the first half mile additional mileage Charged at the rate of $.20 for each additional
    5·1 answer
  • Using partial quotients 5,166 divide by 42
    13·2 answers
  • A law firm ordered 90 boxes of paper clips. There were 80 paper clips in each box. How many
    14·2 answers
  • What is the degree measure of the angle –15π÷2​
    5·1 answer
  • Which of the following is not a Pythagorean triple?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!