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3 years ago

) 2 ft 2 ft Perimeter: Area:

Mathematics

1 answer:

vitfil [10]3 years ago

3 0

Answer:

<h3>perimeter = 8 ft</h3><h3>area = 4 ft</h3>

Solution:

perimeter- 2 + 2 + 2 + 2 = 8

area of square- (length × width) 2 × 2 = 4

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A culture started with 5000 bacteria after three hours it grew 6500 bacteria predict how many bacteria will be present after 13

charle [14.2K]

Answer:

15595 bacteria will be present after 13 hours.

Step-by-step explanation:

Continuous population growth:

The continuous population growth model, for the population after t hours, is given by:

$P(t) = P(0)e^{rt}$

In which P(0) is the initial population and r is the growth rate.

Started with 5000 bacteria

This means that $P(0) = 5000$

$P(t) = 5000e^{rt}$

After three hours it grew 6500 bacteria:

This means that $P(3) = 6500$ . We use this to find r.

$P(t) = 5000e^{rt}$

$6500 = 5000e^{3r}$

$e^{3r} = \frac{65}{50}$

$\ln{e^{3r}} = \ln{\frac{65}{50}}$

$3r = \ln{\frac{65}{50}}$

$r = \frac{\ln{\frac{65}{50}}}{3}$

$r = 0.0875$

$P(t) = 5000e^{0.0875t}$

How many bacteria will be present after 13 hours?

This is P(13). So

$P(13) = 5000e^{0.0875*13} = 15594.8$

Rounding to the nearest whole number

15595 bacteria will be present after 13 hours.

7 0

3 years ago

4 over 5 in standard form

postnew [5]

Answer:0.8

Step-by-step explanation:

it is basically 10 times 8 to the power of -1

7 0

3 years ago

2.<br> 15<br> Turn into decimal

joja [24]

Answer: .15

Step-by-step explanation:

8 0

4 years ago

Read 2 more answers

HELP me please I need some help on math I ain’t good at it at all

zheka24 [161]

Answer:

y = 3

Step-by-step explanation:

3(2y-3) = -4y+21

6y-9 = -4y+21

10y-9 = 21

10y = 30

10y/10 = 30/10

y = 3

3 0

3 years ago

27=3w+6<br> Simplify your answer as much as possible

Delvig [45]

Answer
X=7

Steps:

Subtract 6
21=3w

Divide by 3
X=7

3 0

3 years ago

Read 2 more answers