Which of the following expressions does not represent “increase a quantity n by 25%”?
A. n + 0.25n
B. (1 + 0.25)n
C. 125n
D. 1 1/4 n ( one and one forth n)

Option C) 125n is the expression that does not represent “increase a quantity n by 25%

Step-by-step explanation:

The given expressions are for the quantity n which is increased by 25%.

Option A) n + 0.25n

Put n = 100,

⇒ 100 + 0.25(100)

⇒ 100 + 25

⇒ 125

So, option A) represents the given condition.

Option B) (1 + 0.25)n

Put n = 100,

⇒ (1+0.25) 100

Multiply 100 with each terms inside the bracket.

⇒ 100 + 25

⇒ 125

So, option B) represents the given condition.

Option C) 125n

Put n = 100,

⇒ 125 × 100

⇒ 12500

So, option C) does not represents the given condition.

Option D) 1 1/4 n

Put n = 100,

Convert the mixed fraction to proper fraction

⇒ (5/4) n

⇒ (5/4) 100

⇒ 500 / 4

⇒ 125

So, option D) represents the given condition.

i do not know the answer i am sorry

10.416 meters per second

step-by-step explanation:

distance=1 00 meters

time= 9.6 seconds in decimal form or 9 3/5 as a mixed number

average speed= 100/9.6

=10.416 meters per second or 10 52/125 as a mixed number.