2 years ago

(7th grade math question)

Mathematics

2 answers:

kirill115 [55]2 years ago

6 0

Answer:

It’s B

Step-by-step explanation:

kakasveta [241]2 years ago

5 0

It's B<em> I think. I might have done it wrong. But I pretty sure it's B</em>

You might be interested in

on a trip spain , shelia bought a piece of jewelry that cost 56.75. she paid for it with her credit card, which charges a foreig

prohojiy [21]

So basically find 3% of 56.75
percent means parts out of 100 so 3%=3/100
'of' means multiply
3/100 times 56.75=0.5675
transaction fee=$0.57 (rounded up)

3 0

3 years ago

For z = 2cis 60°, find z4 in rectangular form.

a_sh-v [17]

By DeMoivre's theorem,

$z=2\mathrm{cis}60^\circ\implies z^4=2^4\mathrm{cis}(4\times60)^\circ=16\mathrm{cis}\,240^\circ$
$z^4=16(\cos240^\circ+i\sin240^\circ)$
$z^4=16\left(-\dfrac12-i\dfrac{\sqrt3}2\right)$
$z^4=-8-i8\sqrt3$