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
Citrus2011 [14]
3 years ago
11

A bacteria culture doubles twice a day. There are 143,622 bacteria present on day 15. How many were present on day 10?

Mathematics
1 answer:
gtnhenbr [62]3 years ago
8 0

Answer:

140

Step-by-step explanation:

- 143,622 bacteria present on day 15

- the bacteria doubles twice a day

that means each day backwards, the bacteria is four times less the day before

therefore:

- on day 14, the number of bacteria is 143,622 / 4

which is 35,905.5

and so on!

so:

- day 13 = 8,976.375

- day 12 = 2,244.09375

- day 11 =  561.0234375

- day 10 = 140.255859375

this rounded to the nearest whole number is

= 140 bacteria

(you can't have a part of a bacteria!)

hope this helps! :)

You might be interested in
Determine m∠1 in the triangle. 1.
AlexFokin [52]

Answer:

what is the question

Step-by-step explanation:

8 0
2 years ago
Which points have an x-value less than zero?
Zanzabum

Answer:

C, D, J

Step-by-step explanation:

Points to the left of the y-axis have a negative x- value

Points to the right of the y-axis have a positive x- value

Points on the y-axis have an x- value of zero

C(- 4, 5), D(- 9, 9 ), J(- 9, 0) ← are the coordinates of the points

All have a negative x- value



8 0
2 years ago
1. Which would be a more helpful for solving the system: adding the two equations or subtracting
ira [324]

Answer:

1) Subtracting one from the other

2) x = 0.375 and y = 0.125

Step-by-step explanation:

Equation 1 :

\frac{2x+1}{2y}=7\\\\

Equation 2:

\frac{6x-1}{2y}=5

To solve these equations by the Elimination method we multiply equation 1 with 6 and multiply equation 2 with 2 so now,

\frac{2x+1}{2y} =7\\\\2x+1=14y\\\\Multiplying\ Equation\ 1\  with\ 6\\\\12x+6=84y

Now for the second equation:

\frac{6x-1}{2y}=5\\\\6x-1=10y\\\\Multiplying\ equation\ 2\ with\ 2 \\\\12x-2=20y

Now subtracting equation 2 from equation 1

12x+6=84y\\\\12x-2=20y\\\\Subtracting\ leads\ to\\12x-12x+6-(-2)=84y-20y\\0+8=64y\\8=64y\\8/64=y\\0.125=y

now insert this value of y into any equation

lets insert it into equation 1

\frac{2x+1}{2y} =7\\\\2x+1=14y\\2x+1=14(0.125)\\2x+1=1.75\\2x=1.75-1\\2x=0.75\\x=0.75/2\\x-0.375

5 0
3 years ago
The function f(x)=200(1.4)^t gives the approximate number of fish in a large pond after t years. Select all of the true statemen
tatyana61 [14]
I think the answer would be C
5 0
3 years ago
In JKL. solve for x <br><br> 66.73<br> 74.89<br> 15.44<br> 38.16
liq [111]
By right triangle trigonometry, the sine of the measure of an angle is the ratio of the opposite side of this angle to the hypotenuse.

Thus, \displaystyle{\sin27^{\circ}= \frac{34}{x}


\sin27^{\circ} is a constant which can be found using a calculator:

with calc in pc: view → scientific → 27→sin = 0.45399, 

thus x=34/0.45399=74.89


Answer: 74.89
5 0
3 years ago
Other questions:
  • Maximize the objective function P = 2x + 1.5y for the feasible region shown. State the maximum value for P and the ordered pair
    15·1 answer
  • Select the correct images on the graph.
    11·1 answer
  • The radius of a circle measures 2 inches. What is the measure of its circumference? a. 14.34 inches c. 8.43 inches b. 10.56 inch
    12·2 answers
  • Which is the same function as −6x+1=y ?
    12·2 answers
  • The line plot shows the heights of plants in an experiment, Which statement is supported by the data in the line plot? More plan
    7·1 answer
  • What is the surface area of the cube below?
    10·1 answer
  • Ar a furniture store, a bed frame costs $440 and mattress costs $654. There are currently 7 bed frames in the store, and togethe
    11·1 answer
  • I’m begging you please please ASAP ASAP please ASAP thank you please please ASAP
    12·1 answer
  • Talia has a square bedroom. Her family is moving and her bedroom in her new apartment will be 3 feet shorter in one direction an
    7·1 answer
  • The given line passes through the points and (4, 1).
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!