There are frogs and koi in a pond and the number of frogs and the number of koi in the pond are independent. Let the x represent the number of frogs in any given week, and let y represent the number of koi in any given week. X had a mean of 28 with a standard deviation of 2.7, and y has a mean of 15 with standard deviation of 1.6. Which answer choice correctly calculates and interprets the standard deviation of the difference, D=X-Y?

answer: 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

step-by-step explanation:

4

step-by-step explanation:

im pretty sure it's 4 beacsue 8/2 equals 4

time is equal to distance over rate so

t = d/r

need a little bit more information for the second question.

perimeter = 10 +  √10  units

explanation:

first, we will need to get the length of each line using the distance formula which is as follows:

distance = 

1- length of ab:

ab =   = 5 units

2- length of ac

length of ac is the same as ab = 5 units

3- length of bc:

bc =   =  √10  units

now, we can get the perimeter by adding the side lengths as follows:

perimeter = 5 + 5 +  √10

perimeter = 10 +  √10  units

hope this : )

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