A company makes glass paperweights in the shape of a square pyramid. The base of

Mathematics

1 answer:

Serhud [2]2 years ago

3 0

Step-by-step explanation:

D) 12 in3

How to get the volume

length x width x height

in this case it be

base x height

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Step-by-step explanation:

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Surface area in terms of pi?

Lunna [17]

$\bf \textit{volume of a sphere}\\\\ V=\cfrac{4\pi r^3}{3}~~ \begin{cases} r=radius\\ \cline{1-1} V=972\pi \end{cases}\implies 972\pi =\cfrac{4\pi r^3}{3}\implies 2916\pi =4\pi r^3 \\\\\\ \cfrac{2916}{4\pi }=r^3\implies 729=r^3\implies \sqrt[3]{729}=r\implies 9=r \\\\[-0.35em] ~\dotfill\\\\ \textit{surface area of a sphere}\\\\ SA=4\pi r^2\qquad \qquad \implies SA=4\pi (9)^2\implies \boxed{SA=324\pi }$

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3 years ago

A student answers

Marina CMI [18]

So, we have the percentage she gets which is, 90% and the number of questions she answers correctly, which is 27

To find the number of questions in the exam, make an equation
(90% = $\frac{90}{100}$ = 0.9)
$\frac{90}{100}$ = $\frac{27}{x}$
cross multiply and equate them
90x = 27 x 100
90x = 2700
divide by 90 on either sides to isolate x in order to find the answer
$\frac{90x}{90} = \frac{2700}{90}$
90 and 90 cancels out
x = 30
So your final answer will be, there were 30 questions in the exam paper.

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oksian1 [2.3K]

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Step-by-step explanation:

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