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
Oliga [24]
3 years ago
5

The number of bacteria in a Petri dish increases by 18% every hour. If there were initially 200 bacteria placed in the Petri dis

h, which function can be used to determine the number of bacteria in the Petri dish in exactly x hours?

Mathematics
1 answer:
In-s [12.5K]3 years ago
5 0

Answer:

Step-by-step explanation:

an exponential equation has the form y=ar^x where y=final amount, a=initial amount, r=rate, and x=time, in this case

y=200(1.18)^x

You might be interested in
A geologist examines 6 seawater samples for lead concentration. The mean lead concentration for the sample data is 0.903 cc/cubi
Gnesinka [82]

Answer:

Step-by-step explanation:

We want to determine a 95% confidence interval for the mean lead concentration of sea water samples

Number of samples. n = 6

Mean, u = 0.903 cc/cubic meter

Standard deviation, s = 0.0566

For a confidence level of 95%, the corresponding z value is 1.96. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean +/- z ×standard deviation/√n

It becomes

0.903 +/- 1.96 × 0.0566/√6

= 0.903 +/- 1.96 × 0.0566/2.44948974278

= 0.903 +/- 0.045

The lower end of the confidence interval is 0.903 - 0.045 =0.858

The upper end of the confidence interval is 0.903 + 0.045 =0.948

Therefore, with 95% confidence interval, the mean lead concentration of the sea water is between 0.858 cc/cubic meter and 0.948 cc/cubic meter

7 0
3 years ago
(9CQ) Find the distance from the balloon to the soccer fields.
almond37 [142]

Answer:

The distance from the balloon to the soccer fields = 3.6 miles ⇒ answer (b)

Step-by-step explanation:

* Let the hot air balloon  at point A , the soccer fields

  at point B and the football field at point C

∵ The measure of the angle of depression to the

   soccer fields is 20° 15'

∴ The measure of angle B = 20° 15'

∵ The measure of the angle of depression to the

   football field is 62° 30'

∴ The measure of angle C = 62° 30'

∵ The sum of measures of the interior angles of any triangle = 180°

∴ The measure of angle A = 180 - (20° 15' + 62° 30') = 97° 15'

* The distance between the balloon and the soccer field

  is represented by the side AB of triangle ABC

- Use the sin Rule to find the length of side AB

∵ a/sin(A) = b/sin(B) = c/sin(C)

- a is the side opposite to angle A, b is the side opposite

 to angle B and c is the side opposite to angle C

∵ AB = c ⇒ opposite to angle C

∵ The distance between the two fields = 4 miles

∴ BC = 4 miles

∵ BC = a ⇒ opposite to angle A

∴ 4/sin(97° 15') = c/sin(62° 30')

∴ c = (4 × sin(62° 30')) ÷ sin(97° 15')

∴ c = 3.6 miles

∴ The distance from the balloon to the soccer fields = 3.6 miles

   answer (b)

4 0
3 years ago
Help help help።help plz​
In-s [12.5K]

Answer:

The perimeter is 240

Step-by-step explanation:

The side length is 60 and 60*4=240

hope this help!

7 0
3 years ago
The length of one leg of a right triangle is 24 feet and the length of the hypotenuse is 40 ft what is the length of the other l
Rama09 [41]
To solve for the other leg, you need to use Pythagorean theory.

The theory states that C^2 = A^2 + B^2

In your case, you have to solve for B.
C = 40 (hypotenuse)   A = 24 (leg 1)

The formula rewritten for B is b= \sqrt{c^{2}-a^{2} }

Now, you can solve.

b= \sqrt{c^{2}-a^{2} }

b= \sqrt{40^{2}-24^2 }

b = \sqrt{1600 - 576}

b = \sqrt{1024}

b = 32

Therefore, B = 32.

So the second leg is 32 feet.
7 0
4 years ago
Brainliest and points for best answer.
jeka57 [31]

Answer:

A

Step-by-step explanation:

3 0
4 years ago
Other questions:
  • A parallelogram-shaped sponge is 1 inch by 3 inches. The area of a design is 66 square inches. How many times do you use the spo
    8·2 answers
  • Using the technique in the model above, find the missing side in this 30°-60°-90° right triangle.
    8·2 answers
  • A circle has a radius with endpoints at(2,5) and (-1,-4).Find the circumference and area of the circle.
    8·1 answer
  • Round 17.834 to the nearest tenth. Your answer​
    12·2 answers
  • I don’t really understand this question. So it will be awesome if you help me with it.
    12·1 answer
  • 4 options but only 3 have sea views what fraction has sea view
    5·1 answer
  • What scale is being used if an image of a book on a website is 1.5 inches wide and in real life the book is 9 inches wide?
    6·1 answer
  • Gary's pay is $15 per hour. He receives a 6% pay raise.
    10·2 answers
  • Hiiii a little help here plz !!!!
    12·1 answer
  • What is the following product? Assume x greater-than-or-equal-to 0 and y greater-than-or-equal-to 0
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!