PLS HELP THIS IS DUE TODAY!!

Mathematics

1 answer:

maks197457 [2]2 years ago

5 0

Answer: Hope this helps, please consider making me Brainliest. See below.

Step-by-step explanation:

Let's solve for both by plugging in 5 for x:

Uber Bars: 3 + 1.59x --> 3 + 1.59(5) = 3 + 7.95 = 10.95

Bars Express: 0.99 + 1.99x --> 0.99 + 9.95 --> 10.94

Bars Express is cheaper by one cent lol.

Hope this helps, please consider making me Brainliest.

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Find the surface area of a hemisphere that has a volume of 486π <img src="https://tex.z-dn.net/?f=cm%5E%7B3%7D" id="TexFormula1"

Xelga [282]

$\textit{volume of a hemisphere}\\ V=\cfrac{4\pi r^3}{3}\cdot \cfrac{1}{2}~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ V=486\pi \end{cases}\implies 486\pi =\cfrac{4\pi r^3}{6} \implies 6(486\pi )=4\pi r^3 \\\\\\ \cfrac{6(486\pi )}{4\pi }=r^3\implies 729=r^3\implies \sqrt[3]{729}=r\implies \boxed{9=r} \\\\[-0.35em] ~\dotfill$

$\textit{surface area of a hemisphere}\\\\ SA=4\pi r^2\cdot \cfrac{1}{2}\implies \stackrel{\textit{we know that r = 9}}{SA=2\pi (9)^2}\implies SA=162\pi \implies SA\approx 508.94$