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3 years ago

In a class of 85 students, 40% walk home after school. How many students walk home after

Mathematics

2 answers:

rosijanka [135]3 years ago

3 0

Answer:

34 students walk home after school.

Step-by-step explanation:

85 · 0.40 = 34

evablogger [386]3 years ago

3 0

Answer: 34 students walk home

Step-by-step explanation:

First find what’s 10% of 85 which the answer is 8.5 and multiply by 4.

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6 math geniuses help please!! math

damaskus [11]

Answer:

Step-by-step explanation:

Begin with Euler's formula. I am assuming youre aware of this if youre taking complex algebra? You can prove Euler's formula by doing a Maclaurin expansion of cosine, sine, and e^x. Euler's formula states that:

$e^{ix}=cos(x)+isin(x)$

We can put the first complex number in exponetial form by noticing the input is 2pi/3. The second complex number has an input of pi/3. Therefore:

$z_1=8e^{i(2\pi /3)}$

$z_2=0.5e^{i(\pi /3)}$

Then:

$\frac{z_1}{z_2} =\frac{8e^{i(2\pi /3)}}{0.5e^{i(\pi /3)}}$

Simplify the coefficients to get:

$\frac{z_1}{z_2} =\frac{16e^{i(2\pi /3)}}{e^{i(\pi /3)}}$

When you divide exponentials, you subtract the exponents. Therefore:

$\frac{z_1}{z_2} =16e^{i(2\pi /3)-i(\pi /3)}=16e^{i(\pi /3)$

Put it back into trigonemtric form using Euler's formula:

$16e^{i(\pi /3)}=16cos(\pi /3)+i16sin(\pi /3)$

Cosine of pi/3 is 0.5, and sine of pi/3 is square root of 3 over 2. We have:

$16e^{i(\pi /3)}=16cos(\pi /3)+i16sin(\pi /3)=16*0.5+16*\frac{\sqrt{3} }{2} *i=8+8\sqrt{3} i$

5 0

2 years ago

Bob gets the following homework grades:

tankabanditka [31]

Step-by-step explanation:

for bob;

his grades = 2, 2, 2, 2, 2, 10, 10, 10, 10, 10.

total = 60

mean = total/n

= 60/10 = 6

meadian is the middle value in the set of scores. the numbers are even so =

2+10 / 2

median = 12/2 = 6

standard deviation using excel = 4.216

for tom

7, 7, 7, 7, 7, 7, 7, 7, 7, 7

total = 70

mean = 70/10 = 7

median = 7+7/2 = 14/2 = 7

standard deviation using excel = 0

for pat:

1, 1, 8, 8, 8, 8, 8, 8, 10, 10

total = 70

mean = 70/10 = 7

median = 8+8/2 = 16/2 = 8

standard deviation using excel = 3.265

4 0

3 years ago

The difference of two numbers is 51.884. What is this difference rounded to the nearest tenth

user100 [1]

Answer:

51.9

Step-by-step explanation:

because the 8 in the hundredth colum is greater than 5 so it rounds the other 8 up to nine

3 0

3 years ago

I need help asap!! please!!

andre [41]

Wouldnt it be a dot on the line right in between 75 and 76 pointing towards the left? im not sure

4 0

4 years ago

Read 2 more answers

A $22,000 car depreciates by 12% per year.

asambeis [7]

$22,000 * 0.12 = $2,640
so
$22,000 - $2,640 = $19,360
so
$19,360 after 1 year.

$19,360 * 0.12 = $2,323.20
$19,360 - $2,323.20 = $17,036.80 (2 years)

$17,036.80 * 0.12 = $2,044.416
Don't round until you finish the problem.
$17,036.80 - $2.044.416 = $14,992.384 (3 years)

$14,992.384 * 0.12 = $1,799.08608
$14,992.384 - $1,799.08608 = $13,193.29792 (4 years)
ROUND
$13,193.29792 rounded to $13,193.30

5 0

3 years ago