Astore is marking down the price of a television 25 percent from the original price of $250. which expression can be used to find the marked down price? a: $250 - (0.25)(250) b: $250 + (0.25)(250) c: $250 - (25)(250) d: $250 + (25)(250)

Option A.

Step-by-step explanation:

The original price of a television in a store = $250.00

The store is marking down the price of a television 25 percent from the original price.

25% = = 0.25

The expression can be used to find the marked down price

250 - ( 25% of 250)

= 250 - (0.25)(250)

Option A. is the answer.

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.

so, converting firstly the mixed fractions to improper fractions and then "adding".