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
Troyanec [42]
3 years ago
11

In a lab experiment, 60 bacteria are placed in a petri dish. The conditions are such that the number of bacteria is able to doub

le every 21 hours. How long would it be, to the nearest tenth of an hour, until there are 107 bacteria present?
Mathematics
1 answer:
Levart [38]3 years ago
7 0

Answer:

17.5 hours

Step-by-step explanation:

107 = 60(2^n)

n(lg2) = lg(107/60)

n = 0.8345763908 × 21

n = 17.52610421 hours

You might be interested in
Explain how to model the division of –24 by –4 on a number line.
lianna [129]

Answer:

Here's one way to do it.

Step-by-step explanation:

-24 ÷ (-4)

-24 is the final number on the number line

-4 means you count by 4s on the number line moving backwards.

  1. Start at 0 facing forward.
  2. Move backwards in steps of four units from 0 to -24.
  3. Count the number of steps you took (six).

Answer: +6 (The sign is + because you are still facing forward).

8 0
3 years ago
Help me with these 3 plzz!!! plzzzzz
Harrizon [31]
I tried my best with 1, 2, and 3

6 0
2 years ago
Read 2 more answers
A factory uses 1/6 of a barrel of raisins in each batch of granola bars. Yesterday, the factory used 1/2 of a barrel of raisins.
balu736 [363]

1/6 = 1 batch, 2/6 = 2 batches and so on

if the factory used 1/2, the factory used 3/6 of a barrel, which equals to 3 batches.

<em>hope it helps :)</em>

8 0
2 years ago
After a picnic, 5/12 of the cornbread is left over. Val eats 4/5 of the leftover cornbread. What fraction of the cornbread does
Kay [80]

Answer:

5/12 - 4/5 = -23/60. You can't simplify -23/60. Hope this is right

Step-by-step explanation:

4/5= 48/60

5/12 =  25/60

25/60-48/60= -23/60

3 0
3 years ago
The side of a regular nonagon is 10m. What is the perimeter of the nonagon
MatroZZZ [7]

Answer:

90m

Step-by-step explanation:

9 sides, each is 10, do 9 times 10

4 0
3 years ago
Other questions:
  • Mrs. Johnson is renting a car for vacation and plans to drive a total of 800 Miles. A rental car company charges $153 for the we
    9·2 answers
  • A car travels about 78 feet in one second At this speed about how many feet will the car travel in 5 seconds
    15·1 answer
  • A student currently is averaging 65.0% of the points in lecture (worth 60% of total grade) and has a 75.0% in lab (worth 40% of
    10·1 answer
  • The coordinates of the point of the way from A to B are?<br><br> (Type an ordered pair.)
    10·1 answer
  • Whats 10 divided by 5+10-9x11
    9·2 answers
  • Jenny is comparing the cost of two packages of socks. One package has 8 pairs of socks for $12. Another package has 3 pairs of s
    8·2 answers
  • Im kinda confused about this
    13·1 answer
  • A university considers giving only pass/fail grades to freshmen to reduce competition and stress. The student newspaper intervie
    10·1 answer
  • Amy types at an average speed of 38 words per minute. She has already typed 1,450 words of her final paper, which will be more t
    10·1 answer
  • Which table represents a function? A 2-column table with 4 rows. The first column is labeled x with entries negative 3, 0, negat
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!