Answer:
0,95
Step-by-step explanation:
The value of the expression (7 x 10⁻¹³) − (4.2 x 10⁻¹⁵) will be 6.958 x 10⁻¹³. Then the correct option is C.
<h3>What is subtraction?</h3>
It simply implies subtracting something from an entity, group, location, etc. Subtracting from a collection or a list of ways is known as subtraction.
The expression is given below.
⇒ (7 x 10⁻¹³) − (4.2 x 10⁻¹⁵)
Simplify the equation, then the value of the expression will be
⇒ (7 x 10⁻¹³) − (4.2 x 10⁻¹⁵)
⇒ (7 x 10⁻¹³) − (0.042 x 10⁻¹³)
⇒ 6.958 x 10⁻¹³
The value of the expression (7 x 10⁻¹³) − (4.2 x 10⁻¹⁵) will be 6.958 x 10⁻¹³. Then the correct option is C.
More about the subtraction link is given below.
brainly.com/question/4319655
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Answer:
a) 
b) First we need to calculate the variance given by this formula:

And the deviation would be:

c) 
And using the cdf we got:

d) 
Step-by-step explanation:
For this case we define the random variable X who represent the customers charge, and the distribution for X on this case is:

Part a
For this case the average is given by the expected value and we can use the following formula:

Part b
First we need to calculate the variance given by this formula:

And the deviation would be:

Part c
For this case we want to find the percent between 600 and 889, so we can use the cumulative distribution function given by:

And we can find this probability:

And using the cdf we got:

Part d

And using the cdf we got:

Answer:
the third one!
Step-by-step explanation:
19.18/2.8= 6.85 hours or rounded it would be 7 hours