Annabelle is working to summer jobs making $10 per an hour babysitting and making $20 per hour lifeguarding in a given week she can work no more than 19 total hours and must earn no less than $290 if Annabelle work three hours babysitting determine the maximum number of hall hours lifeguarding does she must work to meet her requirement if there are no possible solutions submit an empty answer

is it 35

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.

b

step-by-step explanation: