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3 years ago

Joey has a beach ball with a radius of 20 cm. What volume of air will it hold when fully inflated? [Round to nearest tenth.]

Mathematics

2 answers:

Anton [14]3 years ago

8 0

Answer:

D) 33,493.3 cm3 hopes this helps :)

Step-by-step explanation:

i took the test

nadya68 [22]3 years ago

4 0

It would be D. because the volume of a sphere is 4/2 x pi x radius^3.

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Algebra help please

Basile [38]

The answer is the third one because it describes what they want

7 0

3 years ago

75 students play basketball this 23% of the total number of students at the school whuch proption could be used to calcuate the

Sergeeva-Olga [200]

75students/23%=Xstudents/100%
x= 326 students

8 0

3 years ago

In △MNK MN = NK, m∠N = 110º, MK = 5. Find MN.

alexgriva [62]

Answer:

MN = 3.03 ≈ 3

Step-by-step explanation:

Given: In ΔMNK MN = NK , m∠N = 110° and MK = 5.

To find: MN = ?

Sol: In ΔMNK,

∠M + ∠N + ∠K = 180° (sum of angles of a triangle)

2∠M = 180° - 110° ( ∠M =∠K since MN = MK)

∠M = 70°/2 = 35°

∴ ∠M = ∠K = 35°

Now, Using Sine Rule for finding sides,

$\frac{m}{sinM} = \frac{n}{sinN} = \frac{k}{SinK}$

$\frac{k}{sinK} = \frac{n}{sinN}$

$\frac{5}{sin 110^{\circ}} = \frac{k}{sin 35^{\circ}}$

$k = \frac{5 sin 35^{\circ}}{sin 110^{\circ}}$

Now ∵ sin 35° = 0.57 and sin 110° = 0.94 approx.

By substituting these values in above expression,

$k = \frac{5 \times 0.57}{0.94}$

k = $\frac{2.85}{0.94}$

k = 3.03

Therefore, MN = 3 approx.

8 0

3 years ago

Find the length of the third side. If necessary, write in simplest radical form.

Kisachek [45]

Answer:

Step-by-step explanation:

This is a right triangle, so we can use the Pythagorean theorem

a^2+b^2 = c^2 where a and b are the legs and c is the hypotenuse

9^2 + (sqrt(19))^2=c^2

81+19 = c^2

100 = c^2

Take the square root of each side

sqrt(100) = sqrt(c^2)

10 = c

The hypotenuse is 10

6 0

3 years ago

Choose the equation and the slope of the line that passes through (4,-2) and is perpendicular to the X-axis.

Tanya [424]

Answer:

C. Equation: x=4

D. Slope: undefined

Step-by-step explanation:

If a line is perpendicular to the x-axis, then it is a vertical line because the x-axis is horizontal.

The slope of a vertical line is undefined.

The equation of a vertical line through $(x_1,y_1)$ is $x=x_1$

Since the vertical line passes through (4,-2), its equation is

$x=4$

3 0

4 years ago