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larisa86 [58]
3 years ago
12

Which of the following represents 0.02 in scientific notation

Mathematics
1 answer:
zysi [14]3 years ago
7 0
2*10^-2 (Ten to the negative 2 power)

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The one with the U shape going up, and the red line is tilting to the left that last picture
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Officials at a major university wanted to know what percent of their students recycle paper. They conducted a random survey and
Crazy boy [7]

Answer:

0.95 = 95% probability that a randomly selected student at this university recycles at least some of the time

Step-by-step explanation:

For a randomly selected student, we have these following probabilities:

0.55 probability that they always recicle.

0.25 probability that they usually recicle.

0.15 probability that they recicle only when it's convenient.

0.05 probability that they never recicle.

What is the probability that a randomly selected student at this university recycles at least some of the time?

Always, usually or only when it's convenient.

0.55 + 0.25 + 0.15 = 0.95

0.95 = 95% probability that a randomly selected student at this university recycles at least some of the time

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3 years ago
In the Chang’s family budget, 0.6% of the expenses are for internet service. What fraction of the family’s expenses is for inter
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2 years ago
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Steve wants to open a savings account. Bank A will increase the interest rate on the savings account by
Katyanochek1 [597]

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7 0
2 years ago
Kim needs to add a 6% saline solution to an IV bag that contains 20 cubic centimeters of 10% saline solution.
Sonja [21]
Let 'x' represent the volume of 6% saline solution
Let 'y' represent the volume of 8% saline solution

Form 2 equations.
Eq. 1: 20+x=y
Meaning 20 cm³ + x cm³=y cm³
Eq 2: 0.06x+0.1(20)=0.08y
Meaning: 6% of x + 10% of 20= 8% of y

Use substitution or elimination to solve this linear system. I used substitution.
Sub. Eq. 1 (20+x=y)  into Eq. 2 (0.06x+0.1(20)=0.08y)
0.06x+ 0.1(20)=0.08(20+x)
0.06x+2+1.6=0.08x
-0.02x= -0.4
x=20

Substitute x=20 into equation 1 (you can also use 2 but in this case equation 1 is simpler)

20+x=y
20+20=y
40=y

To check, substitute x=20 and y=40 into equation 2

0.06x + 0.1(20)= 0.08y
0.06(20) +2 = 0.08(40)
1.2+2= 3.2
3.2=3.2

Therefore, Kim would need 20cm³ of 6% saline solution and 40cm³ of 10% saline solution to make 8% solution.




7 0
2 years ago
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