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denpristay [2]
3 years ago
12

Can anyone help me and explain?

Mathematics
1 answer:
guapka [62]3 years ago
5 0
so \: the \: formula \: of \: the \: area \: of \: a \: circle \: is \: given \: by \: \pi{r}^{2} \\ r \: is \: the \: radius \: of \: the \: diameter \\ to \: find \: the \: radius \: you \: take \: ur \: diameter \: and \: divide \: it \: by \: 2 \\ so \: if \: ur \: diameter \: is \: 10 \: then \: ur \: radius \: would \: be \: 5 \\ with \: that \: you \: can \: apply \: it \: to \: the \: formula \: given \: and \: that \: is \: \pi {5}^{2} \\ btw \: if \: you \: dont \: know \: the \: value \: of \: \pi \: it \: is \: 3.142 \: or \: \frac{22}{7} so \: just \: sub \: that \: in \: and \: you \: will \: get \: ur \: answer \: by \: using \: ur \: calculator
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zlopas [31]

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V = 32

Step-by-step explanation:

Comment

I think you should try this one yourself after I post my answer. Estimation is a very valuable tool -- the more you use it, the handier it gets.

Formulas

pi = 3

V = 4/3 * pi * r^3

Givens

r = 2

pi = 3

Solution

V  = 4/3 * pi * r^3                     Substitute values for symbols

V = 4/3 * 3 * 2^3                      Cancel the 3s

V = 4 * 2^3                               Expand the 2s

V = 4 * 2 * 2 * 2                       Find V

V = 32

4 0
2 years ago
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