Question

A rectangular piece of paper with length
31cm
and width
14cm
has two semicircles cut out of it, as shown below.
Find the area of the paper that remains. Use the value
3.14
for
π
, and do not round your answer. Be sure to include the correct unit in your answer.

Answer 1

@amoodarya

Answer 2

Okay. So first step we have to find the area of the rectangular piece of paper. Formula for the area of a rectangle is

A = l*h

Answer 3

so the area is 544?

Answer 4

Next step. Find the area of the semicircles. Because they make one big circle, we can just find the area of this circle. Area for a circle is:

A = pi * r^2

The radius will be as kantalope said 8 because the radius is half of the diameter.

Answer 5

Okay well before we go into details I know how to work the problem out I just am not sure of when to subtract or add

Answer 6

We know the diameter because they are full half circles off the edge of the paper. That makes the diameter the same as the height of the paper

Answer 7

which is 200.96

Answer 8

Now you just subtract the area of the circle from the area of the rectangle:

Area left = 544 - 200.96

Answer 9

thats the answer?

Answer 10

okay, so the answer would be 343.04 cm^2?

Answer 11

nope told me it was wrong

Answer 12

Thats because he copied and pasted someone else's work lol
http://openstudy.com/study#/updates/5164c953e4b0902dbc1cc94f

Answer 13

Oh dang!! Lol do you know anything about these problems I had someone helping me and they were doing a good job and I was getting them right I just need help cause I cant get past it

Answer 14

Im actually trying right now (:

Answer 15

thank you :) I just don't understand here is a fresh one that I am working on right now if you want to start with that

Answer 16

A training field is formed by joining a rectangle and two semicircles, as shown below. The rectangle is
91m
long and
62m
wide.
Find the area of the training field. Use the value
3.14
for
π
, and do not round your answer. Be sure to include the correct unit in your answer.

Answer 17

@hockeybeast10 @Electronia anyone else know how to help with this problem

Answer 18

First you would have to multiply 91m * 2 = 182m

Answer 19

yes I know that and then you have to divide 62 by 2

Answer 20

any luck

Answer 21

Remind me when where pie comes in, i completely forgot

Answer 22

None :( I completely forgot how these problems were done :((((((

Answer 23

oh ok well thanks anyways

Answer 24

The equations of three lines are given below.
Line 1:
=y−−23x6
Line 2:
=−6x4y−2
Line 3:
=−2y+3x7
For each pair of lines, determine whether they are parallel, perpendicular, or neither.

Answer 25

do you know anything about these

Answer 26

@mooniepie

Answer 27

any luck?

Answer 28

line 1 nethier

Answer 29

okay

Answer 30

What about line 2 and 3

Answer 31

In numbers, if the one line's slope is m = 4/5, then the perpendicular line's slope will be m = –5/4. If the one line's slope is m = –2, then the perpendicular line's slope will be m = 1/2. To answer this question, I'll find the slopes. Since these two lines have identical slopes, then these lines are parallel.

Answer 32

2 and 3

Answer 33

i do not know

Answer 34

huh

Answer 35

well i need someones help its my last topic and i need to get it done

Answer 36

@gabby1214 can you help