Can you please help me with this.

Mathematics

2 answers:

Marat540 [252]3 years ago

6 0

Hope this helps :))))))

yKpoI14uk [10]3 years ago

3 0

Answer:

Step-by-step explanation:

Using the given formula for SA

SA = 2πr² + 2πrh ( r is the radius and h the height )

= 2πr(r + h) ← factoring out 2πr from each term

= 2π × 3 × (3 + 5)

= 6π × 8

= 48π in² → A

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In Mr Tarkiainens each student chooses two of the topics listed in the chart above for their papers how many different pairs can

elena-s [515]

The answer is 90 different pairs.
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8 0

3 years ago

What is 04.151515... into a fraction

Sergio039 [100]

Answer:

$\displaystyle 4.\overline{15} = \frac{137}{33}$ .

Step-by-step explanation:

Start by separating this decimal number into its integer part and its fraction part:

$4.151515\cdots = 4 + 0.151515\cdots$

The most challenging task here is to express $0.151515\cdots$ as a proper fraction. Once that fraction is found, expressing the original number $4.151515\cdots$ will be as simple as rewriting a mixed number as an improper fraction.

Let $x = 0.151515\cdots$ . $(x + 4)$ would then represent the original number.

Note that the repeating digits appear in groups of two. Therefore, if the digits in $x$ are shifted to the left by two places, the repeating part will continue to match:

$\begin{aligned}x = 0.&151515\cdots && \\ 100\, x = 15.& 151515\cdots \end{aligned}$ .

Note, that this "shifting" is as simple as multiplying the initial number by $100$ (same as $10$ raised to the power of the number of digits that needs to be shifted.)