I NEED HELP ASAP

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Step-by-step explanation:

She is using a scale factor of 2.5.

Step-by-step explanation:

All you must do is find the number that when multiplied to 4, makes 10, and when multiplied to 6, makes 15. 4 x 2.5 is like (4 x 2) + (4 x 0.5).

(4 x 2) + (4 x 0.5)

(8) + (2) =

10

The same is applicable for 6.

(6 x 2) + (6 x 0.5)

(12) + (3) =

15

Scale factor = 2.5

$9.89

step-by-step explanation:

9.90 = p x .06 x .25 (3/12 changed to a decimal)

9.90 = p x 0.015

9.90 - 0.015 = p

9.89 = p