Which size random sample is likely to provide the most trustworthy results

Mathematics

1 answer:

Zarrin [17]3 years ago

4 0

At least 30 observations to get a reasonably normal distribution.

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How to solve for the shaded region

k0ka [10]

The shaded region is a triangle. Triangle area can be determined with formula
a = 1/2 × b × h

From the question, we know that the triangle consists of
base = 10 - 6 = 4 m
and the height is the dimension which is perpendicular to the base,
height = 6 m

Find the triangle area
a = 1/2 × b × h
a = 1/2 × 4 × 6
a = 1/2 × 24
a = 12

The area of the shaded region is 12 m²

5 0

3 years ago

Paul is going to have the exterior of his home painted. Painting USA charges $75.00 to come out and evaluate the house plus $25.

user100 [1]

Given:$75
25 hours

Painting USA : Fixed cost: $75 ; Variable Cost: $25x
Total Cost = 75 + 25(25) = 75 + 625 = 700

Upscale Home Painting: No Fixed Cost ; Variable Cost : $40x
Total Cost = 40(25) = 1,000

The most cost effective company will be Painting USA whose charge will amount to $700.

3 0

3 years ago

Erica solved the equation −5x − 25 = 78; her work is shown below. Identify the error and where it was made. (5 points)

NemiM [27]

If you would like to solve the equation -5x - 25 = 78, you should do this using the following steps:

-5x - 25 = 78
-5x - 25 + 25 = 78 + 25
-5x + 0 = 103
-5x = 103 /(-5)
x = 103 / (-5)
x = - 103/5 = - 20.6

The error was already made at step 1.

7 0

3 years ago

Read 2 more answers

Line AB contains points A(-6,3) and B(2,-5). Line AB has a slope that is?

dexar [7]

I believe its -1 because x2-x1/y2-y1 good luck

7 0

3 years ago

The Polygons below are similar. Find the value of z. A. 4.5 B. 7.5 C. 12 D. 16

Misha Larkins [42]

The correct answer is B. 7.5
Similar polygons are polygons wherein its corresponding sides are proportional. All corresponding sides of the larger polygon are proportional to the corresponding sides to the smaller polygon, wherein segment HG is proportional to segment DC, and segment FG is proportional to segment BC. (See attachment for reference) A proportion is an equation that states two ratios are equivalent. By cross multiplying the two ratios, you get an equation for finding the value of z, which is 7.5

8 0

3 years ago