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ra1l [238]
3 years ago
10

7 d = how many hours

Mathematics
2 answers:
Crank3 years ago
5 0
168 hours....................................
vredina [299]3 years ago
3 0
24 hours in a day
24x7=168 hours
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According to the Empirical Rule, what percentage of a normal population falls between 1 standard deviations left of the mean and
svlad2 [7]

Answer:

68% of the data falls within one standard deviation, 95% percent within two standard deviations, and 99.7% within three standard deviations from the mean.

Step-by-step explanation:

6 0
3 years ago
The ratio of boys to girls is 7:12 if there are 76 children how many are girls?
Vikentia [17]
12 girls out of 19, how many out of 76

12 - x
19 - 76

Cross product:

19x= 1152
/19. /19
x= ~61

There are (around) 61 girls
3 0
3 years ago
Read 2 more answers
What is −14 − (+6) =
zepelin [54]

Answer:

-20

Step-by-step explanation:

it basically -14-6

3 0
3 years ago
What is the perimeter of the triangle shown on the coordinate plane, to the nearest tenth of a unit?
Fudgin [204]
The correct answer is 21.6
I just took this quiz and I hope this helps you out.
5 0
3 years ago
Find an equation of the plane tangent to the following surface at the given point.z equals tangent Superscript negative 1 Baseli
Sergeeva-Olga [200]

Let <em>f(x</em>, <em>y</em>, <em>z)</em> = <em>z</em> - arctan(<em>x y</em>). Compute the gradient of <em>f</em> at the point (0, 3, 0):

∇ <em>f(x</em>, <em>y</em>, <em>z)</em> = (-<em>y</em> / (1 + <em>x</em>²<em>y</em>²), -<em>x</em> / (1 + <em>x</em>²<em>y</em>²), 1)

∇ <em>f </em>(0, 3, 0) = (-3, 0, 1)

This vector is orthogonal to the surface <em>z</em> = <em>f(x</em>, <em>y)</em>. Then the equation of the tangent plane is

∇ <em>f </em>(0, 3, 0) • (<em>x</em>, <em>y</em> - 3, <em>z</em>) = 0

(-3, 0, 1) • (<em>x</em>, <em>y</em> - 3, <em>z</em>) = 0

-3<em>x</em> + <em>z</em> = 0

<em>z</em> = 3<em>x</em>

5 0
3 years ago
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