The size of a bicycle is determined by the diameter of the wheel. you want a 22 in. bicycle for your birthday. what is the area of one of the wheels ?

A) 385.47 in. sq.
B) 314.16
C) 484.37
D) 380.13

Question

The size of a bicycle is determined by the diameter of the wheel. you want a 22 in. bicycle for your birthday. what is the area of one of the wheels ?
 
 A) 385.47 in. sq.
 B) 314.16 
 C) 484.37
 D) 380.13

jim_thompson5910 · Answer

Area = pi*radius^2

A = pi*r^2


Note: remember to cut the diameter in half to get the radius

anonymous · Answer

i dont know  the radius cause they didnt even tell me t he diameter. @jim_thompson5910

jim_thompson5910 · Answer

it states that "you want a 22 in. bicycle", so the diameter is 22 in

jim_thompson5910 · Answer

since "The size of a bicycle is determined by the diameter of the wheel"

anonymous · Answer

oh okayy.

anonymous · Answer

i did 3.14*11 and got 34.54 then i squared that and didnt get any of the options available to me ?

jim_thompson5910 · Answer

Remember that to follow the order of operations, you follow PEMDAS

jim_thompson5910 · Answer

The E (for exponent) comes before M (multiplication), so you square before multiplying

jim_thompson5910 · Answer

3.14*11^2

3.14*121

then you multiply

anonymous · Answer

i got 379.94. not an option..?

jim_thompson5910 · Answer

hmm weird, I'm also getting 379.94

anonymous · Answer

it cant be wrong..

jim_thompson5910 · Answer

hmm let me reread...one sec

anonymous · Answer

@SmoothMath helpp ?

jim_thompson5910 · Answer

maybe if you used 22/7 for pi, it gets you somewhat closer

jim_thompson5910 · Answer

oh wait, just type pi instead of 3.14 and you'll get a much better answer

jim_thompson5910 · Answer

A = pi*r^2

A = pi*11^2

A  = 121pi

A = 380.13271108