http://prntscr.com/509eg2

Question

shinalcantara · Answer

you just have to identify which is 15% or 0.15 from the choices of fractions
let's say for the the first option, 8.50 is multiplied by 3/20.. convert 3/20 to decimal.. what could be its decimal equivalent?

igreen · Answer

15% of 8.5 is 1.275

1.275 + 8.5 = 9.775.

So the cost after the raise is $9.775

Now you just have to find out which option equals 9.775.

igreen · Answer

@shinalcantara I don't think that's right..I think it want's the price after the raise..not the raise price..(1.275).

igreen · Answer

I think the answer is C because:

$8.5 \cdot \dfrac{23}{20} = 9.775$

shinalcantara · Answer

it doesn't make sense though.
the expression would have been in geometric progression
$$A_n = 8.50r^{n-1}$$
$$A_n = 8.50(0.15)^{n-1}$$

igreen · Answer

Me too.

shinalcantara · Answer

*awkward*

igreen · Answer

xD