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3 years ago

Who wants points a thanks 5 stars and be marked as the brainliest

Mathematics

1 answer:

-Dominant- [34]3 years ago

4 0

Answer:

4 * 10 ^-5

Step-by-step explanation:

To find the area multiply length times width

A = .005 * 8 * 10^ -3

= .04 * 10 ^-3

But this is not scientific notation

We need to move the decimal 2 places to the left

This means subtract 2 from the exponent

4 * 10 ^-5

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If an regular interior angle of a regular polygon is 140 degrees, how many sides does the polygon have and I need the work

torisob [31]

Answer:

9 sides

Step-by-step explanation:

exterior angle + interior angle = 180° , so

exterior angle + 140° = 180° ( subtract 140° from both sides )

exterior angle = 40°

The sum of the exterior angles of a polygon = 360°

Dividing sum by the measure of 1 exterior angles gives number of sides

number of sides = $\frac{360}{40}$ = 9

8 0

2 years ago

The figure is made up of a square and a rectangle. Find the area of the shaded region.

Viefleur [7K]

Answer:

40 square metres

Step-by-step explanation:

The shaded region is of a triangle, whose area is denoted by: A = (1/2) * b * h, where b is the base and h is the height.

Since the left figure is a square with side lengths 10, we know that the height of the triangle is also 10 metres. The right figure is a rectangle with length 4. Since the total base length of the entire figure is 18 and the base of the square is 10, then the width of the rectangle is 18 - 10 = 8 metres.

This width is also the base of the triangle, so b = 8.

Now plug these values into the equation:

A = (1/2) * b * h

A = (1/2) * 8 * 10 = (1/2) * 80 = 40

The area is 40 square metres.

6 0

3 years ago

Read 2 more answers

To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine foun

QveST [7]

Answer:

We conclude that the mean nicotine content is less than 31.7 milligrams for this brand of cigarette.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 31.7 milligrams

Sample mean, $\bar{x}$ = 28.5 milligrams

Sample size, n = 9

Alpha, α = 0.05

Sample standard deviation, s = 2.8 milligrams

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 31.7\text{ milligrams}\\H_A: \mu < 31.7\text{ milligrams}$

We use One-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{28.5 - 31.7}{\frac{2.8}{\sqrt{9}} } = -3.429$

Now, $t_{critical} \text{ at 0.05 level of significance, 8 degree of freedom } = -1.860$

Since,

$t_{stat} < t_{critical}$

We fail to accept the null hypothesis and accept the alternate hypothesis. We conclude that the mean nicotine content is less than 31.7 milligrams for this brand of cigarette.

3 0

3 years ago

Ayuda plis es para hoy

aivan3 [116]

Es la segunda media es 1.65, mediana es 1.65, y modo es 1.61

5 0

2 years ago

Vary hard 6th grade work

DochEvi [55]

And uh the work? Lol

3 0

3 years ago

Read 2 more answers