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scoundrel [369]
3 years ago
8

What is 0.00000342 in scientific notation

Mathematics
1 answer:
saveliy_v [14]3 years ago
5 0

move the decimal point to the right of the 3 ( count the number of places you moved it) that would be the exponent and since you moved it to the right it would be negative

3.42 x 10^-6

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Rationalize the denominator of square root of negative 49 over open parentheses 7 minus 2 i close parentheses minus open parenth
navik [9.2K]

The answer is the option d, which is: d) \frac{-77+21i}{130}

The explanation for this problem is shown below:

1. Smplify the denominator and rewrite the numerator in this form:

\frac{7i}{7-2i-4-9i} \\\frac{7i}{3-11i}

2. Multiply the denominator and the numerator by the conjugated (3+11i) and simplify the expression, as following:

\frac{7i(3+11i)}{(3-11i)(3+11i)} \\ \frac{21i+77i^{2}}{121+9}  \\ \frac{-77+21i}{130}

3. As you can see, you obtain the expression shown in the option mentioned above.

3 0
3 years ago
You have 15 pennies in your pocket. Of those pennies, 3 are Canadian. Suppose you pick a penny out of your pocket at random. Fin
den301095 [7]
The best and most correct answer among the choices provided by your question is the fourth choice or letter D. The probability is 4/5.

<span>P ( canadian)= 3/15 = 1/5
On the other hand, P (not canadian) = 1 - 1/5 = 4/5</span>

I hope my answer has come to your help. Thank you for posting your question here in Brainly.
4 0
3 years ago
Given that an adult likes soccer, what is the probability the adult is aged 18–30? 8.1% 18.1% 24.5% 44.4%
dsp73

The probability that an adult likes soccer is aged between  18–30 will be 44.4%.

We have an adult who likes soccer.

We have to determine the probability the adult is aged 18–30.

<h3>What is Probability?</h3>

The formula to calculate the probability of occurrence of an event 'A' can be written as -  

P(A)  =  \frac{n(A)}{n(S)}

where -

n(A) = Number of outcomes favorable to event A.

n(S) = Total number of outcomes.

According to question, we have an adult likes soccer.

The answer to this question is based on the hypothesis that the adults between 18 - 30 are highly energetic. To be more precisely - the adults in the range 18 - 24 and 24 - 30 are highly energetic and full of stamina. Above the age 30, the number of adults who like soccer will start to decrease and will hit nearly zero between the age range of 55 - 65 as the adults in this age group found it very difficult to even walk.

Mathematically -

The probability of an event A = an adult likes soccer is aged between  18–30 will be the highest value among the ones mentioned in options.

Hence, the probability that an adult likes soccer is aged between  18–30 will be 44.4%.

To solve more questions on Probability, visit the link below -

brainly.com/question/24028840

#SPJ1

4 0
1 year ago
The length and the breadth of a rectangular piece of land are 500m and 300m respectively. Find it’s area
katrin [286]
Area of a rectangle = Length x Breadth
The required area = 500 x 300
= 150000 m^2
6 0
3 years ago
Read 2 more answers
Simplify the expression:<br><br> q+5(3+6q)
xenn [34]

Answer:

31q+15

Step-by-step explanation:

7 0
3 years ago
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