You can buy shampoo in a 5-ounce bottle for $2.49 or in a 15-ounce bottle for $9.69.

Assuming you want more for less..

By getting 3 5-ounce bottles you get the same amount as a 15-ounce bottle.

However for 3 5-ounce bottles it would cost you 7.47 $ cents. While a 15-ounce battle would cost you 9.69 $ (2.22 $ more)

So in buying 3 5-ounce bottles you save 2.22 dollars in comparison to a 15-ounce bottle.

I hope this helped! If you think I'm worthy, Brainliest would be amazing! :D

8121 because

130,000 divided by 16 is 8121

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.