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
prohojiy [21]
3 years ago
14

A bacteria culture initially contains 100 cells and grows at a rate proportional to its size. After an hour the population has i

ncreased to 420. Find the rate of growth after 3 hours.
Mathematics
2 answers:
Assoli18 [71]3 years ago
8 0

Step-by-step explanation:

Rate of growth equals 420/100 = 4.2 times per hour

So after t=three hours,

size of culture = 100*(4.2)^t = 100*4.2^3=7408.8 bacteria,

round to nearest unit 7409 bacteria after three hours (after initial size of 100).

prohojiy [21]3 years ago
6 0

Answer:

a) 100•4.2^t

b) P(3)= about 7409 bacteria

c) P’(3)= about 10,632 bacteria per hour

d) t= about 3.2 hours

Step-by-step explanation:

You might be interested in
FREE BRAINLY TO THE CORRECT ANSWER!!
Lyrx [107]

Answer: -3

Step-by-step explanation:

y = mx + b (slope intercept formula)

9x - 3y = -54

-3y = 9x - 54

Divide all by -3

y = -3x + 18

Slope = -3

Hope this helps!

8 0
3 years ago
Which statement best describes making payments with a debit card?
FromTheMoon [43]
The answer is A.payments are directly deducted from your account
5 0
3 years ago
PLEASE HELP, GIVING 55 POINTS IF YOU ANSWER (08.03/08.05 MC) A pair of equations is shown below: y = 3x − 5 y = 6x − 8 Part A: E
Andrew [12]

Answer:

  A. (1, -2)

  B. the lines intersect at the solution point: (1, -2).

Step-by-step explanation:

A. The equations can be solve by substitution by using the y-expression provided by one of them to substitute for y in the other.

This gives ...

  3x -5 = 6x -8

Adding 8-3x to both sides, we get ...

  3 = 3x

Dividing both sides by 3 gives ...

  1 = x

Substituting this value into the first equation, we can find y:

  y = 3(1) -5 = -2

The solution is (x, y) = (1, -2).

__

B. The lines intersect at the solution point, the point that satisfies both equations simultaneously. That point is (1, -2).

8 0
3 years ago
How to determine the volume of a cup?​
snow_lady [41]

Answer:

1 to 8  in cups or 1 to 16 in table spoons

Step-by-step explanation:

4 0
3 years ago
Find the slope and y-internet.
algol [13]
-2/1 is the slope
-5 is the y intercept
6 0
2 years ago
Other questions:
  • What are 3 equivalent ratios for 32/24
    6·2 answers
  • Which is the equation of a circle that has a center of (-1, 3) and passes through the point (3, 6)?
    13·2 answers
  • An engineer performs a flow test of a cooling water system. There are 32 flow elements. For each flow element she needs two 3 fe
    9·1 answer
  • Mrs. Clark had 1/2 of a cherry pie left over. She split the leftover pie evenly between her 2 children. What fraction of a pie d
    5·1 answer
  • Determine whether the given line a positive slope,a negative slope, a zero slope, or an undefined slope.
    10·1 answer
  • What is ad over ab in it's simplest form
    11·1 answer
  • Clara and Toby are telemarketers. Yesterday, Clara reached 4 people in 10 phone calls, while Toby reached 3 people in 8 phone ca
    13·2 answers
  • Mm....................................
    11·1 answer
  • Y’all plz help me here it’s a math quiz I’ll give a lot of points for the right answer
    8·1 answer
  • Which number makes the equation true?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!