Megan purchased a new gadget for her technology hobby. she plans to sell it sometime in the future, however, its value depreciates monthly. the expression below shows the depreciated sales value of the gadget: 2020 – 22m what does the constant term of the expression represent? a. the original value of the gadget. b. the year megan plans to sell the gadget. c. the monthly depreciation value of the gadget. d. the amount of money megan will get when she sells the gadget.

The cost of the gadget after 'm' months = 2020 - 22m

The above statement tells that if every month Megan has the gadget, its price falls by 22 bucks from the original value.

The original value of the gadget is 2020 bucks.

So, the constant term of the expression represents the original value of the gadget, which does not change after the purchase is made.

Hence the answer is

A.  The original value of the gadget.

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.