Ask question

Ask question

All categories

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?

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

What value of x makes the vertical parts of the letter N parallel?<br> picture provided

tangare [24]

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

$2x + 9 = 5x$

$5x = 2x + 9$

Subtract sides 2x

$- 2x + 5x = - 2x + 2x + 9$

$3x = 9$

Divide sides by 3

$\frac{3x}{3} = \frac{9}{3} \\$

$x = 3$

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

CHECK :

$2x + 9 = 5x$

$2(3) + 9 = 5(3)$

$6 + 9 = 15$

$15 = 15$

So the value is correct.

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

8 0

3 years ago

Triangle ABC has vertices of A(-6,7) B(4,-1), and C(-2,-9). Find the length of the median from angle B in triangle ABC.

AfilCa [17]

The length of the median from angle B is 8.

4 0

3 years ago

Given n//m <br>prove m and 3 = m angle 5

Alla [95]

Answer:

7

Step-by-step expla

5 0

3 years ago

PLEASE HELP, URGENT!!!

sveticcg [70]

For this equation, let b equal the cost per box.
b=$100/5

4 0

3 years ago

The perimeter of a square is 36<br>what is the area of the square?

zmey [24]

Answer: 81 units²

Step-by-step explanation: To solve this problem, remember that the formula for the area of a square is 4s.

Therefore, since the perimeter of the given square is 36, we have 36 = 4s and dividing both sides by 4, 9 = s.

Now, remember that the formula for the area of a square is s² and since the length of a side of the given square is 9, we have (9)² or 81.

So the area of a square that has a perimeter of 36 is 81 units².

6 0

3 years ago