For each of the 4 stroke categories, consider a random variable representing the time of a randomly selected swimmer in that category. what is the standard deviation of the sum of the 4 random variables? 0.83 seconds a 1.67 seconds b 2.80 seconds c 3.32 seconds d 3.76 seconds e submit

3, nah jk it's 2

step-by-step explanation:

it is 3 cause i'm sanic

answer: a

step-by-step explanation:

10.2 units

d

step-by-step explanation:

given

y + 3 = - 4(x - 2) ← distribute the parenthesis

y + 3 = - 4x + 8 ( subtract 3 from both sides )

y = - 4x + 5 → d

part a

in a city ice cream is mostly only bought when the temperature is very high as ice cream cools down our

so we can derive the conclusion that as the temperature increases the number of ice creams sold also increases

part b

y intercept is 5

slope is 2

happy to

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