Noah sees a pair of shoes he wants to buy. the shoes have an original price of $40 but are $10 off this week. noah has a coupon for an additional 20% off of the sale price of the shoes. what is the total percent discount (total markdown) that noah will receive on the shoes before tax is calculated?

40% ($16)

Step-by-step explanation:

$40-$10 (for sale)=$30

100%=$30

10%=$3

20%=$6

$6+$10=$16

$16=40% of $40

range is infinite on both x and y axis positive and negative

step-by-step explanation:

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.