Mobistar is a mobile services company that sells 800 phones each week
when it charges $80 per phone. it sells 40 more phones per week for each
$2 decrease in price. the company's revenue is the product of the
number of phones sold and the price of each phone. what price should
the company charge to maximize its revenue?
part a: let d represent the number of $2 decreases in price. letr be the
company's revenue. write a quadratic function that reflects the
company's revenue.
hint: the number of phones sold will be 800 + 40d since they sell 40 more
phones for every $2 decrease. the price for the phones will be 80 - 2d
since d is the number of decreases and each decrease is $2.

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.

the option best identifies the textual evidence that supports this conclusion is c.) when an argument is over, how many weighty reasons does a man recollect which his heat and violence made him utterly forget? in order to recognize textual evidence is to identify the topic sentence where the author states the main idea. textual evidence is what supports the topic sentence or main idea of a passage.