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3 years ago

Can someone check my work? Also it’s equivalent ratios and I was wondering if this his how you do it?

Mathematics

1 answer:

Mademuasel [1]3 years ago

5 0

Answer:no no you got it keep going your on the right path

Step-by-step explanation:

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If a spherical ball is enlarged so that its surface area is 9 times greater than its original surface area, then the original ra

luda_lava [24]

The surface area of a sphere is $A = 4 \pi r^{2}$ and if the original S.A was is enlarged to have it 9 times greater, the radius would be multiplied by 3 or roughly 2.99626 rounded off to 3.0.

For example, let us assign values.
Let A=90

A= 90*9 = 810

$90 = 4 \pi r^{2} 

$ and $810 = 4 \pi r ^{2}$

the first r is 2.68 and the second r is 8.03

then, $\frac{8.03}{2.68} = 2.99626$ or rounded off to 3.

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3 years ago

Each square represents one square foot. Estimate the area of the figure below.

JulijaS [17]

The estimated area of the figure is 36 square foot.

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3 years ago

Please refer to the graph to answer the question. When there was an excess supply of shoes, there was also a(n) _____ of shoes.

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4 years ago

Read 2 more answers

PLEASEEE HELP !! in two the three sentences, explain how you would find the line of symmetry for the parabola whose equation is

Arada [10]

Answer:

Axis of symmetry line is parallel to y- axis

Equation of the parabola ( x - ( -2 ))² = (y - 12 )

Step-by-step explanation:

Explanation:-

Given equation is y = x²+4 x+16

y = x²+2 (2 ) x + (2)² - (2)² + 16

y = ( x + 2 )² + 12

( x + 2 )² = y - 12

( x - ( -2 ))² = (y - 12 )

( x- h)² = 4 a ( y - k)

Center (h ,k) = ( -2 , 12)

Here 4 a = 1

a = 1/4

Focus S = ( h , K +a) = ( -2 , 12 + 0.25) = ( -2 , 12.25)

Axis of symmetry line is parallel to y- axis

5 0

3 years ago

What are the approximate solutions of 4x2 + 3 = −12x to the nearest hundredth?

Gwar [14]

First
$4x^{2} + 12x + 3 = 0$
determine if this equation were factorable, it's not for this one
so I use quadratic formula, try to search the formula online

$x1 = \frac{-12 + \sqrt{(12)^{2} - 4*4*3} } {2*4} = \frac{-12 + 4\sqrt{6} }{8} = \frac{4(-3 + \sqrt{6}) }{8} = \frac{-3 + \sqrt{6}}{2} = - 0.28$
$x2 = \frac{-12 - \sqrt{(12)^{2} - 4*4*3} } {2*4} = \frac{-12 - 4\sqrt{6} }{8} = \frac{4(-3 - \sqrt{6}) }{8} = \frac{-3 - \sqrt{6}}{2} = - 2.72$

x ≈ −2.72 and x ≈ −0.28 is the solution

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4 years ago