Grady marks down some $3.59 pens to $3.09 for a week and then makes them back up to $3.59. find the
percent of increase and the percent of decrease to the nearest tenth, are the percents of change the same
for both price changes? if not, which is a greater change? complete the explanation, and round your
percents to the nearest tenth.
the first change was (select of
9. the two percent changes select
greater
% and the second change was (select) of
the same, and the select) percent change is

1; 35 is the ratio

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.

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