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viktelen [127]
3 years ago
14

The population of a certain single-cell organism doubles every hour, starting with 100 cells. Which COULD be an equation to mode

l this situation, where f(t) is the number of organisms and t is time in hours
Mathematics
1 answer:
ludmilkaskok [199]3 years ago
6 0

Answer:

f(t)=100e^{0.6931t}

Step-by-step explanation:

The initial number of cells = 100 and it doubles every hour.

Let the exponential function be

A=Pe^{rt}

In 1 hour, A = 2P

2P=Pe^{r\cdot1}\\\\2=e^r\\\\r=\ln2\\\\r=

Therefore, the model of the given situation is given by

f(t)=100e^{0.6931t}

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The manufacturer of hardness testing equipment uses​ steel-ball indenters to penetrate metal that is being tested.​ However, the
kumpel [21]

Answer:

Check the explanation

Step-by-step explanation:

Let X denotes steel ball and Y denotes diamond

\bar{x_1} = 1/9( 50+57+......+51+53)

=530/9

=58.89

\bar{x_2}= 1/9( 52+ 56+....+ 51+ 56)

=543/9

=60.33

difference = d =(60.33- 58.89)

=1.44

s^2=1/n\sum xi^2 - n/(n-1)\bar{x}^2

s12 = 1/9( 502+572+......+512+532) -9/8 (58.89)2

=31686/8 - 9/8( 3468.03)

=3960.75 - 3901.53

=59.22

s1 = 7.69

s22 = 1/9( 522+ 562+....+ 512+ 562) -9/8 (60.33)2

=33295/8 - 9/8 (3640.11)

=4161.875 - 4095.12

=66.75

s2 =8.17

sample standard deviation for difference is

s=\sqrt{[(n1-1)s_1^2+ (n2-1)s_2^2]/(n1+n2-2)}

 = \sqrt{[(9-1)*59.22+ (9-1)*66.75]/(9+9-2)}

= \sqrt{1007.76/16}

=7.93

sd = s*\sqrt{(1/n1)+(1/n2)}

=7.93*\sqrt{(1/9)+(1/9)}

=7.93* 0.47

=3.74

For 95% confidence level Z (\alpha /2) =1.96

confidence interval is

d\pm Z(\alpha /2)*s_d

=(1.44 - 1.96* 3.75 , 1.44+1.96* 3.75)

=(1.44 - 7.35 , 1.44 + 7.35)

=(-2.31, 8.79)

There is sufficient evidence to conclude that the two indenters produce different hardness readings.

3 0
3 years ago
I NEED THIS DONE IN 3 HOURS AND I CANT FIGURE IT OUT PLEASE HELP
MAVERICK [17]

1. option 1

2. option 1

3. option 4

4. option 1

5. option c

explanation is in picture attached.

excuse me.for my bad handwriting

8 0
3 years ago
The Gomez family has completed 50% of a trip, They have<br> traveled 40 miles. How far is the trip?
Anettt [7]

Answer: 80 miles

Work: I just did 40 times 2 because they completed half their trip, and they need to complete 40 more miles.

<em>Happy Holidays! :)</em>

4 0
3 years ago
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help At 1:00 P.M. the water level of a pool is 13 inches At 1:30 P.M. the water level is 18 inches At 2:30 the water level is 28
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The answer is 5 . because if you count the # it will go to 28
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3 years ago
What is the measure of the indicated angle 103° ?
Elina [12.6K]

Answer:

77 degrees.

Step-by-step explanation:

180-103=77

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