Write two decimals that can be rounded to 1.5

Mathematics

2 answers:

evablogger [386]3 years ago

5 0

It can be either 1.4 or 1.3 or your looking to your nearest 5th

Marina86 [1]3 years ago

3 0

1.51 and 1.52 can be rounded.

I'm not totally sure about it. My elementary school teacher once said:
"Four or less, go to rest (keep it like that). Five or more then one more (self-explanatory))

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A sector of a circle makes a 127° angle at its centre. If the arc of the sector has length 36 mm, find

Veseljchak [2.6K]

Answer:

Approximately $68.5\; \rm mm$ .

Step-by-step explanation:

Convert the angle of this sector to radians:

$\begin{aligned}\theta &= 127^{\circ} \\ &= 127^{\circ} \times \frac{2\pi}{360^{\circ}} \\ &\approx 2.22\end{aligned}$ .

The formula $s = r\, \theta$ relates the arc length $s$ of a sector of angle $\theta$ (in radians) to the radius $r$ of this sector.

In this question, it is given that the arc length of this sector is $s = 36\; \rm mm$ . It was found that $\theta = 2.22$ radians. Rearrange the equation $s = r\, \theta$ to find the radius $r$ of this sector: