Find the standard deviation of the words per page. 10 15 8 16 14 12 9 12 14 10

Standard deviation =  2.569

Step-by-step explanation:

The mean = (10 + 15 + 8 + 16 + 14 + 12 + 9 + 12 + 14 + 10) ÷ 10 = 12

x - mean = -2 , 3 , -4 , 4 , 2 , 0 , -3 , 0 , 2 , -2

(x - mean)² = 4 , 9 , 16 , 16 , 4 , 0 , 9 , 0 , 4 , 4

Σ(x - mean)² = 4 + 9 + 16 + 16 + 4 + 0 + 9 + 0 + 4 + 4 = 66

Standard deviation = √(66/10) = 2.569

tube or goog would be a great resource to with that question

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt