To raise money for a trip, a sixth grade class is selling ballpoint pens. The class wants to sell 1,000 pens. The class has 8 boxes with 92 pens in each box. If they sell all of the pens in these boxes, how many more pens do they still need to sell to reach their goal?

264 more pens

Step-by-step explanation:

92 x 8 = 736

1000 - 736 = 264

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.