3 years ago

The formula for the area of a sector with a central angle in radians is ?

Mathematics

1 answer:

zlopas [31]3 years ago

4 0

$S= \frac{r^2*\alpha}{2}$

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A chemist has 5 1/10 kg of calcium chloride. If she uses 0.15 kg of the compound each time she performs and experiment, for how

Licemer1 [7]

Answer:

5 1/10 ÷ .15 is 34 so she will be able to perform 34 experiments

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3 years ago

Sally paid the following bills rent $450.00 cell phone $37.50 and cable $69.99 how much money did she pay ?

romanna [79]

Answer:

557.49

Step-by-step explanation:

Add the three bills together

450.00

37.50

69.99

--------------

557.49

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3 years ago

Which fraction do you multiply by to simplify 5/ 4 - 3i ?

Rzqust [24]

So I assume
$\frac{5}{4-3i}$

If so. Let us begin.

$\mathrm{Multiply\:by\:the\:conjugate}\:\frac{4+3i}{4+3i} \ \textgreater \ \frac{5\left(4+3i\right)}{\left(4-3i\right)\left(4+3i\right)} \ \textgreater \ \left(4-3i\right)\left(4+3i\right)$

$\mathrm{Apply\:complex\:arithmetic\:rule}:\ \left(a+bi\right)\left(a-bi\right)=a^2+b^2$
$Where\;a=4,\:b=-3 \ \textgreater \ 4^2+\left(-3\right)^2 \ \textgreater \ Refine \ \textgreater \ 25$

$\frac{5\left(4+3i\right)}{25} \ \textgreater \ \mathrm{Cancel\:the\:common\:factor:}\:5 \ \textgreater \ \frac{4+3i}{5}$

$Group\:the\:real\:part\:and\:the\:imaginary\:part\:of\:the\:complex\:number$
$\frac{4}{5}+\frac{3}{5}i\;is\;our\;answer!$

Hope this helps!

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3 years ago

Solve each inequality(x+4)(x-8)≥0

Stolb23 [73]

Answer: x

≤

−

≥

Step-by-step explanation:

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2 years ago

This is a problem I really need help on please help so I actually have two lol put please help with 7 and 8

grigory [225]

Answer:

f(n) = 80*3^n

f(n) = 4 * 3^(n - 1)

7 0

3 years ago