4. A new outfit that you would like to buy costs $110. If you have a coupon
for 22% off, what is the amount of money you will save?

24.2

Step-by-step explanation:

To find the amount we will save we should extract 22% out of $110 and to find how much 22% is 110 we multiply 110 by 22 and divide that by 100

110 × 22 ÷ 100 = 24.2

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.

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step-by-step explanation: