Astudent wants to reduce the size of an article he found in a newspaper. the original article was 12 cm wide. he needs to reduce it so its width measures 9cm. on the copier, what percent setting should he can use to make a copy this size? i use time4 learning homeschool website, and it used incorrect wording, which might confuse you, but this is exactly how the question is stated. !

the answer is 90% and i use Time4learning as well so i know how it feels when no one is around to help but the answer is 90% hope it helps.

Step-by-step explanation:

i got 142 as my answer

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.