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3 years ago

I will mark Brainiest (no links please)

Mathematics

1 answer:

Vera_Pavlovna [14]3 years ago

6 0

Answer:

Step-by-step explanation:

Are the volumes equal? No, so throw out the first and the last one.

Is the volume of the pyramid greater than the volume of prism?

No, so throw out the third one

so by inspection it must be the remaining one

or mathematically

vol pyramid = (1/3)(base)(height)

vol prism = (base)(height)

vol pyramid / vol prism

(1/3)(base)(height) / (base)(height) = 1/3

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Answer:

Step-by-step explanation:

7*3=21

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Log_{7 }(5 - 3x) Find the derivative

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Let y be the expression you want to differentiate:

$y=\log_7(5-3x) \implies 7^y=5-3x$

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3 years ago

WORTH 99 POINTS!

Ksivusya [100]

The general formula for the lateral surface area of a regular pyramid is:
$A= \frac{1}{2} *p*l$
Where:
p=perimeter of a base
l=slant height

a.
a=3ft
l=4ft
p=5*a=5*3=15ft
$A= \frac{1}{2} *15*4=30 ft^{2}$

b.
a=2.5ft
l=4ft
p=6*a=6*2.5=15ft
$A= \frac{1}{2} *15*4=30 ft^{2}$

c.
a=1.9ft
l=4ft
p=8*a=8*1.9=15.2ft
$A= \frac{1}{2} *15.2*4=30.4 ft^{2}$

d.
Based on a lateral surface area the blue umbrella is best choice. But, the best umbrella overall is the one with the greatest base area. General formula for regular polygon is:
$A= \frac{1}{4} *n* a^{2}*cot( \frac{180}{n} )$

For pentagon:
A=15.48ft^2
For hexagon:
A=16.24ft^2
For octagon:
A=17.43ft^2
Blue umbrella is still best choice.

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andreev551 [17]

Answer:

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