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2 years ago

What is the exam score for an exam whose z-score is 1.25?

Mathematics

1 answer:

mojhsa [17]2 years ago

4 0

Answer:

Step-by-step explanation:

A z-score of 1.25 means that the actual exam score is 1.25 standard deviations above the mean, and therefore the exam score we are looking for is: mean + 1.25 * SD = 75 + 1.25 * 8 = 85

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Find the area of the regular polygon. Round to the nearest tenth.

mojhsa [17]

Given:

Side length = 12 in

To find:

The area of the regular polygon.

Solution:

Number of sides (n) = 6

Let us find the apothem using formula:

$$a=\frac{s}{2 \tan \left(\frac{180^\circ}{n}\right)}$

where s is side length and n is number of sides.

$$a=\frac{12}{2 \tan \left(\frac{180^\circ}{6}\right)}$

$$a=\frac{6}{ \tan (30^\circ)}$

$$a=\frac{6}{ \frac{1}{\sqrt{3} }}$

$$a=6\sqrt{3}$

Area of the regular polygon:

$A=\frac{1}{2}(\text { Perimeter })(\text { apothem })$

$$A=\frac{1}{2}(6 \times 12)(6\sqrt{3} )$

$$A=\frac{1}{2}(72)(6\sqrt{3} )$

$A=216 \sqrt{3}$

$A=374.1$ in²

The area of the regular polygon is 374.1 in².

4 0

2 years ago

4. Ten less than the product of six and eight less than a number

ICE Princess25 [194]

Answer: 38

Step-by-step explanation:

6 x 8 = 48

48 - 10 = 38

7 0

2 years ago

What type of relationship does this equation represent?

Klio2033 [76]

Answer:

Nonproportional

Step-by-step explanation:

hope it helps.

8 0

1 year ago

Read 2 more answers

~.❤~Please Answer~❤.~

lord [1]

Answer:

a,b

Step-by-step explanation:

5 0

2 years ago

Can someone please help me out?

tankabanditka [31]

Answer:

Step-by-step explanation:

3 0

1 year ago