Kayden spent $8 on a movie and later some money on dinner. She spent a total of $30. Part A: In the first box, enter an equation to represent the number of dollars, d, that Kayden spent on dinner.
Part B: In the second box, enter the number of dollars represented by d in this situation.

$30 - $8 = d

d = $22

Step-by-step explanation:

I think I did it right

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.