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maria [59]
2 years ago
9

A teacher has a chart she would like to enlarge to put on a bulletin board. The chart is 8 cm across, and the space on the bulle

tin board is 40 cm across. What should the zoom setting be for a copy this size?
Mathematics
2 answers:
PSYCHO15rus [73]2 years ago
6 0
40 divided by 8 is equal to 5 so 5 is going to be the zoom size
ira [324]2 years ago
6 0

Answer:

500%

Step-by-step explanation:

here is one way to solve this problem. Let x represent the unknown copy Percent. Set up a proportion like this one, and solve for x using cross multiplication.

x = 40

100= 8

8x=40*100

8x=4,000

x= 500&

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A researcher is studying a group of field mice. the distribution of the weight of field mice is approximately normal with mean 2
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Answer:

b

Step-by-step explanation:

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2 years ago
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Write the equation of the line that is parallel to the line y=-7/4x-2 through the point (4,2)! Help please
Sladkaya [172]

as you already know, the equation y=-7/4x-2, is already in slope-intercept form and thus its slope is the coefficient of the "x", namely -7/4.

parallel lines have the same exact slope, so a parallel line to this one will also have a slope of -7/4, and it passes through 4,2,

\bf (\stackrel{x_1}{4}~,~\stackrel{y_1}{2})\qquad \qquad \qquad  slope =  m\implies -\cfrac{7}{4} \\\\\\ \stackrel{\textit{point-slope form}}{y- y_1= m(x- x_1)}\implies y-2=-\cfrac{7}{4}(x-4) \\\\\\ y-2=-\cfrac{7}{4}x+7\implies y=-\cfrac{7}{4}x+9

6 0
2 years ago
Isabella paid one of her bill late and owed a 4% late fee was 780. How much was Isabella's original bill in dollar
Rainbow [258]
You multipy 0.04 x 780
5 0
2 years ago
Sin70cos10-cos70sin10
ololo11 [35]
We know that sin(a-b) = sina.cosb - cosa.sinb

if a=70  &  b=10 the sin(70-10) = sin(60) = √3/2

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3 0
2 years ago
Pls explain your work!
mylen [45]

Answer:

find total volume to find what amount is 20%

hack, is put the 20% in alreadyy to find 20% volume

20%=1/5

so

vcone=1/3(hpir^2)

times thath by 1/5

vcone=1/15(hpir^2)

d/2=r

given

4.8=d

4.8/2=d/2=r=2.4

10=h

V=1/15(10pi2.4^2)

V=1/15(10pi5.76)

V=1/15(57.6pi)

V=3.84pi

V=12.0637 cubic inches=20% of vase

0.5 cubc inches per min

0.5 times t=12.0637

divide both sides by 0.5

t=24.1237

about 24 minutes

Step-by-step explanation:

6 0
2 years ago
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