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Dahasolnce [82]

2 years ago

8

Find the perimeter of the window. Round your answer to the nearest tenth.

1 answer:

liberstina [14]2 years ago

5 0

1) The perimeter is the sum of the lengths of the straight edge (the diameter of the semicircle) and the length of the arc of the semicircle.

The circumference of a 4 ft circle is
π*diameter = π*4 ft ≈ 12.566 ft
The semicircle will have a length that is half that, 6.283 ft. When this length is added to the diameter, the perimeter is found to be
Perimeter = 4 ft + 6.283 ft ≈ 10.3 ft.

2) The area of a circle is given by the formula
A = (π/4)d²
For a diameter of 15 inches, the area is
A = (π/4)(15 in)² = 56.25π in²
A ≈ 176.7146 in²

The area of the circle is about 176.71 in².

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What unit is used to measure the density of a solid?

just olya [345]

If both pieces of metal are made of the same material the ratio of the mass and volume will be the same. here the symbol M stands for the mass of the object, and V the volume. Density has the units of mass divided by volume such as grams per centimeters cube (g/cm3) or kilograms per liter (kg/l).

8 0

2 years ago

What is this plz explain

castortr0y [4]

Answer:

Answer as follows...

Step-by-step explanation:

interior angles are 3,4,5,6

exterior angles are 1,2,7,8

vertical angles are 2and3, 1and4, 6and7, 5and8

corresponding angles are 2and6 1and5 3and7 4and8

alternate interior angles are 4and5 3and6

alternate exterior angles are 1and8 2and7

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3 years ago

Write what kind of quadrilateral you see in each figure and determine exactly what kind of parallelogram, trapezoid, or trapezoi

irinina [24]

Answer:

Step-by-step explanation:

66.

rectangle or square (if sides are equal.)

67.

trapezoid

68

trapezoid.

69.

scalene quadrilateral.

7 0

2 years ago

A study was conducted to compare the proportion of drivers in Boston and New York who wore seat belts while driving. Data were c

allochka39001 [22]

Answer:

a) The test statistic is $z = -2.51$

b) The pvalue is 0.0060.

Step-by-step explanation:

Question a:

Ha: pB < pNY

This means that the alternate hypothesis is rewritten as:

$H_a: p_{B} - p_{NY} < 0$

While the null hypothesis is:

$H_0: p_{B} - p_{NY} = 0$

The test statistic is:

$z = \frac{X - \mu}{s}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis and s is the standard error

pB = 0.581, pNY = 0.832

This means that $X = 0.581 - 0.832 = -0.251$

0 is tested at the null hypothesis:

This means that $\mu = 0$

Standard error = 0.1

This means that $s = 0.1$

Test statistic:

$z = \frac{X - \mu}{s}$

$z = \frac{-0.251 - 0}{0.1}$

$z = -2.51$

The test statistic is $z = -2.51$

Question b:

The pvalue is the probability of finding a proportion less than -0.251, that is, a difference of at least 0.251, which is the pvalue of Z = -2.51.

Looking at the z-table, Z = -2.51 has a pvalue of 0.0060

The pvalue is 0.0060.

5 0

3 years ago

The distance d of a particle moving in a straight line is given by d(t) = 2t3 + 5t – 2, where t is given in seconds and d is mea

Sedaia [141]

Answer:

Step-by-step explanation:

hello,

$v(t)=\dfrac{d(t)}{t}=2t^2+5-\dfrac{2}{t}$

hope this helps

8 0

3 years ago