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3 years ago

If the sphere shown above has a radius of 10 units then what is the approximate volume of the sphere

Mathematics

2 answers:

mestny [16]3 years ago

8 0

Answer: 4188.79

Step-by-step explanation:

Volume of the sphere is calculated by

V=4/3πr3

Where π is a constant, approximately 3.142

r = radius

From the question, given r = 10

Volume = 4/3 × 3.142 x 10 ^3

= 1.33333 x 3.142 x 1000

Volume =4188.79

Sophie [7]3 years ago

3 0

Answer: 4,188.79 u^3

Step-by-step explanation: Volume of a sphere is (4/3)pi•r^3

10^3 = 1000

(4/3) • pi • 1000 = 4,188.79 (rounded to 2 decimals)

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3 years ago

Please help me out :P

Veseljchak [2.6K]

cos θ = $\frac{-4\sqrt{65} }{65}$ , sin θ = $\frac{-7\sqrt{65} }{65}$ , cot θ = 4/7, sec θ = $\frac{-\sqrt{65} }{4}$ , cosec θ = $\frac{-\sqrt{65} }{7}$

<h3>What are trigonometric ratios?</h3>

Trigonometric Ratios are values of all the trigonometric functions based on the value of the ratio of sides in a right-angled triangle.

Sin θ: Opposite Side to θ/Hypotenuse

Tan θ: Opposite Side/Adjacent Side & Sin θ/Cos

Cos θ: Adjacent Side to θ/Hypotenuse

Sec θ: Hypotenuse/Adjacent Side & 1/cos θ

Analysis:

tan θ = opposite/adjacent = 7/4

opposite = 7, adjacent = 4.

we now look for the hypotenuse of the right angled triangle

hypotenuse = $\sqrt{7^{2} + 4^{2} }$ = $\sqrt{49+16}$ = $\sqrt{65}$

sin θ = opposite/ hyp = $\frac{7}{\sqrt{65} }$

Rationalize, $\frac{7}{\sqrt{65} }$ x $\frac{\sqrt{65} }{\sqrt{65} }$ = $\frac{7\sqrt{65} }{65}$

But θ is in the third quadrant(180 - 270) and in the third quadrant only tan and cot are positive others are negative.

Therefore, sin θ = - $\frac{7\sqrt{65} }{65}$

cos θ = adj/hyp = $\frac{4}{\sqrt{65} }$

By rationalizing and knowing that cos θ is negative, cos θ = - $\frac{-4\sqrt{65} }{65}$

cot θ = 1/tan θ = 1/7/4 = 4/7

sec θ = 1/cos θ = 1/ $\frac{4}{\sqrt{65} }$ = - $\frac{-\sqrt{65} }{4}$

cosec θ = 1/sin θ = 1/ $\frac{\sqrt{65} }{7}$ = $\frac{-\sqrt{65} }{7}$

Learn more about trigonometric ratios: brainly.com/question/24349828

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Can you please help me <br> Step by step as well for brainliest

romanna [79]

Answer:

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42:7=ED:24

cross multiply 42 into 24.

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Then use pythageorous theorem.

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