Mathematics: James types 84 words in 2 minutes he estimates that he has his history essay is 420 words long what is the least amount of time james will need to type his essay

James types 84 words in 2 minutes he estimates that

Ответ:

ScarySkyler5571

30.05.2020

Mathematics

84 words = 2 min
1 word = 2/84 = 1/42
420 words = 1/42 x 420 = 10 mins

10 mins

0,0(0 оценок)

Ответ:

StupidBoy

16.06.2020

Mathematics

$\bf \qquad \textit{power of two complex numbers}
\\\\\
[\quad r[cos(\theta)+isin(\theta)]\quad ]^{{ n}}\implies r^{{ n}}[cos({{ n}}\cdot \theta)+isin({{ n}}\cdot \theta)]\\\\
-------------------------------\\\\$

$\bf z^5=\left[ 1\left[ cos\left( \frac{4\pi }{7} \right)+i\ sin\left( \frac{4\pi }{7} \right) \right] \right]^5
\\\\\\
z^5=1^5\left[ cos\left( 5\cdot \frac{4\pi }{7} \right)+i\ sin\left( 5\cdot \frac{4\pi }{7} \right) \right]
\\\\\\
z^5=1\left[ cos\left( \frac{20\pi }{7} \right)+i\ sin\left( \frac{20\pi }{7} \right) \right]\implies z^5= cos\left( \frac{20\pi }{7} \right)+i\ sin\left( \frac{20\pi }{7} \right)$

0,0(0 оценок)

James types 84 words in 2 minutes he estimates that he has his history essay is 420 words long what is the least amount of time james will need to type his essay

Ответ:

Ответ:

Ask your question to the AI advisor

More tips

Answers on questions: Mathematics

Ask an AI advisor a question