The diameter D of a sphere is 18.6 cm. Calculate the sphere's surface area A

Mathematics

1 answer:

IRINA_888 [86]2 years ago

6 0

Answer:

1086.3 cm²

Step-by-step explanation:

surface are of sphere = πD²

SA = (3.14)(18.6 cm)^2

SA = 1086.3 cm²

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Reduced form of 2ab^2-a^2 b^2/5

Ket [755]

Answer:

$2ab^2-\frac{a^2b^2}{5}=\frac{10ab^2-a^2b^2}{5}$

Step-by-step explanation:

Given the expression

$2ab^2-\frac{a^2b^2}{5}$

$\mathrm{Convert\:element\:to\:fraction}:\quad \:2ab^2=\frac{2ab^25}{5}$

$2ab^2-\frac{a^2b^2}{5}=\frac{2ab^2\cdot \:5}{5}-\frac{a^2b^2}{5}$

$\mathrm{Since\:the\:denominators\:are\:equal,\:combine\:the\:fractions}:\quad \frac{a}{c}\pm \frac{b}{c}=\frac{a\pm \:b}{c}$

$=\frac{2ab^2\cdot \:5-a^2b^2}{5}$

$=\frac{10ab^2-a^2b^2}{5}$

Thus,

$2ab^2-\frac{a^2b^2}{5}=\frac{10ab^2-a^2b^2}{5}$

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2 years ago

The graph below shows a household’s budget. If the household spends $2,000 a month, which of the following statements is not tru

andreev551 [17]

The THIRD statement is not true.
$2000 (spends a month)
The 5% of $2000 is only $100 for food.

The first statement is true "The household spend $260 per month on the car".
13 % of $2000 = $260

The second statement is true "The household spend $600 per month for rent".
30% of $2000 = $600

The fourth statement is also true "The household spend $200 in savings each month"
10% of $2000 = $200

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2 years ago

Simply the expression

Rashid [163]

Answer:

12+27a

Step-by-step explanation:

3(4+9a)=3(4)+3(9a)=12+27a

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1 year ago

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