3 years ago

If the diameter of a sphere is 4 ft, then what is its surface area? Leave your answers in terms of π

Mathematics

2 answers:

Lerok [7]3 years ago

8 0

The diameter is = (4/3)(pi)(d/2)(d/2) = (4/3)(pi)(16) = pi*64/3

torisob [31]3 years ago

6 0

Answer:

Step-by-step explanation:

π= 180

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Figure out the slope of the line that passed through each pair of points (4,-11) and (7,-8)

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$slope = \frac{ - 8 - ( - 11)}{7 - 4} \\$

$slope = \frac{ - 8 + 11}{7 - 4} \\$

$slope = \frac{3}{3} \\$

$slope = 1$

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The two trains the same distance from Buffalo is 20

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Estimate 59 times 8<br> A. 60 <br> B. 480<br> C. 700<br> D. 240

Lana71 [14]

Answer:

480 is the answer

Step-by-step explanation:

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3 years ago

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Are the two expressions equivalent 5(3x+8) 8x+8 when x=10

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Step-by-step explanation:

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Mrrafil [7]

Answer:

a. $\frac{2x + 3}{x+5}$

b. x ≠ -5 (Vertical asymptote) and x ≠ 5 (Hole)

Step-by-step explanation:

Factor the numerator (Grouping):

$2x^2 - 7x - 15$

Two numbers that multiply to -30 and add to -7 = -3 and 10

$[2x^2 - 10x] + [3x - 15]$

$(2x + 3)(x - 5)$

Factor the denominator (Difference of Two Squares):

$x^2 - 25$ = $(x +5)(x-5)$

Factored Expression:

(x - 5) can be factored out of top and bottom as a hole-

$\frac{(2x + 3)(x - 5)}{(x + 5)(x - 5)} = \frac{2x + 3}{x+5}$

Variable Restrictions:

Denominator ≠ 0

$x + 5 = 0\\x = -5$

Vertical asymptote at x = -5 ⇒ x ≠ -5

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