OMG noob maths help please (1 Viewer)

[kevin.huynh]

I forgot everything for last year T_T
lol
i need help with a question.

In 1987 council rates increased by 7.5%. The new rate for a property is $1735. What was the old price of the property? Give your answer to the nearest dollar.
I know its noob, but helpp lol.

 

[kurt.physics]

I forgot everything for last year T_T
lol
i need help with a question.

In 1987 council rates increased by 7.5%. The new rate for a property is $1735. What was the old price of the property? Give your answer to the nearest dollar.
I know its noob, but helpp lol.

Okay, so the new rate is equal to 100% + 7.5% = 107.5%, so 107.5% = $1735, then just solve. If you need help with it, just ask

 

[kevin.huynh]

so i just divide 1735 by 107.5%?

ans = $1613.95

 

[Air Jordan]

Correct

 

[kevin.huynh]

omg guys sorry one more ><

Calculate 8.72 x 10^3 / 1.34 x 10^7
write your answer in standard form correct to 3 sig fig

:\

 

[Air Jordan]

Assuming the question had brackets, my calculator got 0.000651

 

[kevin.huynh]

yeah same
it shows the answer as 6.51 x 10^-10 though
but thats in scientific :\
i think the answers have flaws

 

[x33.datchick.xx]

LOL!

even i couldnt work that one out... well both actually.
i guess my brains kinda still dead right now. need to bring it back to life hahaha

 

[Air Jordan]

yeah same
it shows the answer as 6.51 x 10^-10 though
but thats in scientific :\
i think the answers have flaws

What do the answers say? And how did you get the same answer if yours is to the power of -10 whilst mine was to the power of -4?

I got 6.51 x 10^-4 because I used brackets. I assumed the REAL question was more like (8.72 x 10^3) / (1.34 x 10^7) because that is a more common question lol. If not then mybad xD

 

[savio23q]

Im getting :
(8.72 x 10^3) / (1.34 x 10^7) = 6.51x10^-4

OR without brakets:
6.51x10^10

 

[kevin.huynh]

omg guys sorry one more ><

Calculate 8.72 x 10^3 / 1.34 x 10^7
write your answer in standard form correct to 3 sig fig

:\

OMG
SORRY!
im such a douche bag
i wrote the Question wrong
Calculate 8.72 x 10^-3 / 1.34 x 10^7
write your answer in standard form correct to 3 sig fig

doh

the answer makes sense now
but its still in scientific notation :\ when it says show the answer in standard form correct to 3 sig fig, unless that means scientific notation


the book answer is 6.51 x 10^-10

 

[Air Jordan]

lol... The numbers would not change, only the decimal placing. Refering to savio btw.

 

[kurt.physics]

I got 6.51 x 10^-4

I got this aswell.

edit: With the edited question, i get it with -10.

 

[Air Jordan]

Ok now I got 6.501 x 10^-10

Anymore?

 

[kevin.huynh]

ok to clear it up
im putting (8.72 x 10^-3) / (1.34 x 10^7)
in my calculator
and im getting 6.507462687 x10^-10
which im guess is where they're getting their answer from: 6.51 x 10^-10

sorry for being a pain


lol no thats it for now
thanks everyone and your airness

 

[kurt.physics]

ok to clear it up
im putting (8.72 x 10^-3) / (1.34 x 10^7)
in my calculator
and im getting 6.507462687 x10^-10
which im guess is where they're getting their answer from: 6.51 x 10^-10

sorry for being a pain


lol no thats it for now
thanks everyone and your airness

yes, this is right.

 

[tenaia]

In 1987 council rates increased by 7.5%. The new rate for a property is $1735. What was the old price of the property? Give your answer to the nearest dollar.



well we need to find 7.5 percent of 1735 bucks

then we have to minus the percentage answer with our original price (1735)



i havent got a calculator so i dont know the answer



ps its not easy stuff!



I HOPE IM RIGHT!!! :S