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3 years ago

A culture of 1.08×1015 bacteria is in petri dish A. A culture of 2.7×1011 bacteria is in petri dish B.

Mathematics

2 answers:

Sphinxa [80]3 years ago

7 0

Answer:The number of bacteria in petri dish A is 4000 times greater than petri dish B.

Step-by-step explanation:

Culture of bacteria in petri dish A= $1.08\times10^{15}$

Culture of bacteria in petri dish B= $2.7\times10^{11}$

Dividing culture of bacteria in petri dish A bu culturebacteria in petri dish B ,we get

$\frac{1.08\times10^{15}}{2.7\times10^{11}}=\frac{108\times10^{15-11}}{270}\\\\=\frac{108}{270}\times10^{4}=0.4\times10^4=4000$

Therefore, the number of bacteria in petri dish A is 4000 times greater than petri dish B.

dalvyx [7]3 years ago

3 0

1.08×10^15
------------------ = 0.4 x 10^4 = 4000
 2.7×10^11

answer
4000 times greater

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A two sample t-test is used to compared the means of two samples who were exposed to different scenarios and therefore, it helps us to see the difference between these two samples.

In this problem, the teacher is experimenting with a new computer-based instruction. To be able to use the two-sample t-test she would have to have two randomly assigned samples and expose each of these two samples to different scenarios (one would receive a traditional instruction and the other one would receive a computer instruction), and finally she would need to compare the scores in both samples.

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Following are the true statements

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Step-by-step explanation:

Expression is 20a + 15ab + 24b

Now lets have a look at each of the options provided!

1. The factors common to 20a and 15ab are 1, 5, a, and b.

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2. The factors common to 20a and 15ab are 1, 5, and a.

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3. The factors common to 20a and 24b are 1, 2, and 4.

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4. The GCF of the expression is ab.

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5. The GCF of the expression is 1

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