Question

Hi, again, Jim.

Answer 1

@jim_thompson5910

Answer 2

Add it together and it is 2,500?

Answer 3

Or you can use the perimeter of a rectangle formula

P = 2*(L+W)
P = 2*(500+750)
P = 2*1250
P = 2500

either way, the final answer is definitely 2500. So nice work

Answer 4

Ok thanks! Can you walk me through this one then one more? I think i know, Just making sure, (pi, easy)..

Answer 5

You use the area of a circle formula

A = pi*r^2

since we're approximating pi, replace pi with 3.14

A = 3.14*r^2

Answer 6

next plug in r = 9.6 and evaluate

Answer 7

Sorry to bother you, I just want a good grade and an understanding, so I wouldn't forget it, i know that pi = 3.14 x r^2

Answer 8

Ok! 60.288? I keep getting that... ?

Answer 9

\[\Large A = \pi*r^2\]
\[\Large A \approx 3.14*r^2\]
\[\Large A \approx 3.14*9.6^2\]
\[\Large A \approx 3.14*92.16\]
\[\Large A \approx 289.3824\]
289.3824 rounds to 289.38

Answer 10

oh alright.

Answer 11

TY! What is the A = for a square?

Answer 12

the area of a square formula?

Answer 13

mhm

Answer 14

area of a square = (side)*(side) = (side)^2

the `^2` means square exponent

Answer 15

? Example?

Answer 16

example:

area of a square with side length of 16 is 256

because 16*16 = 256

Answer 17

Ok So how to do part 2? Almost done (ty)

Answer 18

what's the area of each shape?

Answer 19

Umm 81 for square?..

Answer 20

and..

Answer 21

when they say "8 inch round cake" they mean the diameter is 8 inches, so the radius is 4 inches

use r = 4 to find the area of the circle

Answer 22

50.24?

Answer 23

\[4^2 x 3.14?\]

Answer 24

good

Answer 25

now subtract the two areas

Answer 26

(bigger) - (smaller)

Answer 27

Ty! LAST QUESTION, I Think I NAILED a, b not so sure.

Answer 28

(Ugh your so kind.. Thanks).

Answer 29

I am writing how I got it, though, is it right?

Answer 30

hopefully you have this formula in your notes

C = pi*d

C is the circumference of the circle
d is the diameter

Answer 31

3.14 x 2.5?

Answer 32

yes that will lead to the approximate circumference

use more digits of pi to get a better accurate answer

Answer 33

oh
7.85? (rounded 8)

Answer 34

Thanks! Part B? (i NEED help I do not understand overall. )

Answer 35

Do I have to divide 1 mile ( 5,280,) by 8 or something?

Answer 36

well the circumference is approximately 7.85398163397449 feet

we need to go 5280 feet

so

7.85398163397449*x = 5280
x = 5280/7.85398163397449
x = 672.270479620166

which means that the wheel must rotate approximately 672.27 times
if you must round this to the nearest whole number, then you'll have to round up to ensure you go over a mile. So round to 673

Answer 37

Ok THANK YOU SO MUCH!

Answer 38

no problem

Answer 39

No the final answer would not be 2500 because he walked the around the park four times and it asks for the TOTAL distance. So you would have to multiply 2500 by 4. It's a trick question. Hope this helped

Answer 40

Ok, I know that now, it was wrong and said 10,000.

Answer 41

oh I missed that subtle detail, good catch @manvirk21