1. Denise found errors on 4 of the 250 pages she has read. What is the probability that she finds an error on the next page she reads? A. 0.016%

B. 0.625%

C. 1.6%

D. 6.25%

2. Mr. Kim randomly divides his class into groups. Each group has 5 students and each group is randomly assigned 1 of 6 projects to do. Which simulation best models the outcomes of the groups Mr. Kim sets up?
A. spinning a spinner divided into 5 equal sections, and flipping a coin 3 times

B. rolling 2 number cubes, each with the numbers 1-6 on it

C. flipping a coin 5 times, and spinning a spinner divided into 6 equal sections

D. drawing 1 of 5 numbered papers out of a bag, and rolling a number cube with the numbers 1-6 on it one time

people went from manufacturing one object at a time by hand to manufacturing many objects in factories

the line of

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.