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igor_vitrenko [27]
3 years ago
13

I give brainliest! A person is going 80 miles per hour. How long does it take for the person to go 80 miles?

Mathematics
2 answers:
elena-14-01-66 [18.8K]3 years ago
6 0

Answer:

1 hr

i think if im wrong im super sorry

Step-by-step explanation:

fenix001 [56]3 years ago
5 0
Answer: 1 hour
explanation: bruh are you serious
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A bacteria culture grows with constant relative growth rate. The bacteria count was 1,920 after 4 hours and 1,966,080 after 12 h
attashe74 [19]

From the calculation, the growth rate is 0.88.

<h3>What is the growth rate?</h3>

To find the relative growth rate

P1 = Poe^rt

P2 = Poe^rt

Thus;

1920 = Poe^4r ------ (1)

1966080 =Poe^12r -------(2)

P2/P1 gives;

1966080/1920 = Poe^12r/Poe^4r

1024 = e^12r/e^4r

1024 =e^8r

1024 = (e^r)^8

2^10 = (e^r)^8

e^r = 2^1.25

e^r = 2.38

r = ln(2.38)

r = 0.88

The initial size of the culture is;

1920 = Poe^(0.88 * 4)

Po = 1920/e^(0.88 * 4)

Po = 57

The  expression for the exact number of bacteria after t hours is

P(t) = 57e^0.08t

The growth (in bacteria per hour) after 9.5 hours is

P(t) = 57e^(0.88 * 9.5)

P(t) = 243544

For the number to reach 72,000;

72,000 =  57e^0.88t

72,000/57 = e^0.88t

ln 126 = ln[e^0.88t]

4.8 = 0.88t

t = 4.8/0.88

t = 5.5 hours

Learn more about exponential growth;brainly.com/question/13674608

#SPJ1

8 0
2 years ago
5c+4(dt6c) HELP ME !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
inysia [295]
The answer is 5c+24ctd
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Step-by-step explanation:

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The answer will be 7x^2 + 5x
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A count of the number of men for every 100 women in a particular population is called the:
Amiraneli [1.4K]

It is known and called sex ratio, The sex ratio in the ratio of males to every female in the population in each country. According to the research, for every 1000 people, there are 50.4% of male and 49.6% of female. So that there are more male in the entire world than female and also according to research the sex ratio for the entire world are 107 males and 100 females.

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