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3 years ago

Is 10.2 x 10 written in scientific notation. EXPLAIN

Mathematics

2 answers:

Virty [35]3 years ago

7 0

Answer:

Step-by-step explanation:

Scientific notation has to be a number between 1 and 10 times 10 to the something power. 10.2 is not between 1 and 10

amid [387]3 years ago

6 0

Answer:
No
Explanation: First the decimal has to go behind the first non-zero digit. Secondly there is no exponent above the 10.

Hoped that helped.

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A random sample of 10 observations was selected from a normal population distribution. The sample mean and sample standard devia

Delvig [45]

Answer:

18.0167≤x≤21.9833

Step-by-step explanation:

Given the following

sample size n = 10

standard deviation s = 3.2

Sample mean = 20

z-score at 95% = 1.96

Confidence Interval = x ± z×s/√n

Confidence Interval = 20 ± 1.96×3.2/√10

Confidence Interval = 20 ± (1.96×3.2/3.16)

Confidence Interval = 20 ± (1.96×1.0119)

Confidence Interval = 20 ± 1.9833

CI = {20-1.9833, 20+1.9833}

CI = {18.0167, 21.9833}

Hence the required confidence interval is 18.0167≤x≤21.9833

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3 years ago

Rectangle ABCD is shown with diagonal AC drawn. Point F is on AC and point E on DC such that FE is perpendicular to DC. Prove tr

777dan777 [17]

Triangle ABC is similar to triangle CEF.

Explanation:

Diagram is inserted for the reference.

ABCD is a rectangle.

ABC is a right angled triangle because all the angles of the rectangle are 90◦ - (a)

CEF is a right angled triangle because FE is perpendicular to DC – (b)

In triangles ABC and CEF,

1. Angle ABC = Angle CEF = 90◦ (Both are right angles from a and b)

2. Angle BCA = Angle EFC (Alternate angles on parallel lines are equal on intersection)

Hence using Similarity property of AA (Angle, Angle), Triangle ABC and CEF are similar.

5 0

3 years ago

Abc is a right angled triangle calculate the angle of ac

topjm [15]

Answer:

$Solution,\\In~triangle~ABC,\\cosA = \frac{Base}{Height} \\or, cos65^o=\frac{AB}{AC} \\or, cos65^o = \frac{5}{AC} \\or, AC = \frac{5}{cos65^o}\\or, AC = 11.83m$

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3 years ago

You need to find the area of the shaded region

hammer [34]

Answer:

8.695=area of shaded region

Step-by-step explanation:

pi x 16=50.265

this is the whole circle

the radius is also the side of the hexagon

the picture is formula for area of hexagon

if you replace a by the side which is 4

the answer is 41.57

50.265-41.57=8.695

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3 years ago

Helen draws a random circle.

andriy [413]

Answer:

Lower Bound = 2.996

Upper bound = 3.244

Step-by-step explanation:

8 0

3 years ago