Equivalent expressions

rita and tina each make $11 an hour working as cashiers at a supermarket. last week, rita worked r hours while tina worked t hours. rita also worked overtime hours during the week, for which she was paid an extra $32 flat wage. which expressions represent the total weekly wages of both rita and tina? one answer from each answer box must be chosen

box 1: 11(r)(t) + 32 box 2: 11(r + t) + 32 box 3: 11r+11t+32
(11r + 32) + 11t 11(r + t) + 32r 11rt + 32
(11t + 32r) + 11r 11(rt) + 32 11r + 32t +11

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.