3 years ago

What is the surface area of a sphere with a radius of 30 m?

2 answers:

7 0

The surface of a sphere is given by the formula:
area=4πr²

Data:
r=30 m

area=4ππ(30 m)²=3600π m².

Answer: the area of this sphere is 3600π m².

alisha [4.7K]3 years ago

3 0

Answer:

D: 3,600π m^2

Step-by-step explanation:

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3 years ago

Solve x^4 - 3x^2 +2 = 0 using substitution.

Leona [35]

Answer:

x = ± 1 , x = ± $\sqrt{2}$

Step-by-step explanation:

Let u = x² , then

$x^{4}$ - 3x² + 2 = 0 , can be expressed as

u² - 3u + 2 = 0 ← in standard form

(u - 1)(u - 2) = 0 ← in factored form

Equate each factor to zero and solve for u

u - 1 = 0 ⇒ u = 1

u - 2 = 0 ⇒ u = 2

Change the variable u back to x

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2 years ago

The area of a pentagon increased by 27 is the same as four times the area of the pentagon, minus 15. what is the area of the pen

Basile [38]

Set up an algebraic equation. This is what it looks like based on what the question tells you:

Let a = area of pentagon
a+27 = 4a-15
3a-15 = 27
3a = 42
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3 years ago

What is mod and div helpppppp

lapo4ka [179]

Modular arithmetic is all about finding the remainder from long division (MOD), and the total number of times that a number goes into a division (DIV<span>).</span>

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3 years ago

Use the table of values to find the function's values. Ja) Ifx 0, then f0) = If fe) = 27, then x= -3 33 -2 17 0 -15 2 27

Paha777 [63]

Answer:

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Step-by-step explanation:

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