Suppose a certain species bird has an average weight of T = 3.80 grams. Based on previous studies, we can assume that the weights of these birds have a normal distribution with download?verifier=afmiTkn9HlJBrkfZ7 dbvki grams. For a small group of 10 birds, find the margin of error for a 70% confidence interval for the average weights of these birds. a. 0.02 gramsb. 0.04 gramsc. 0.06 gramsd. 0.12 grams

the answer is ! ?

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)

5x + 3y = - 4

step-by-step explanation:

the equation of a line in standard form is

ax + by = c ( a is a positive integer and b, c are integers )

express the line first of all in slope- intercept form

y = mx + c ( m is the slope and c the y-intercept )

to calculate m use the gradient formula

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

with (x₁, y₁ ) = (7, - 3) and (x₂, y₂ ) = (4, - 8)

m = = -

y = - x + c ← is the partial equation

to find c substitute either of the 2 points into the partial equation

using (4, - 8 ), then

- 8 = - + c ⇒ c = -

y = - x - ← in slope-intercept form

multiply all terms by 3 to eliminate the fractions

3y = - 5x - 4 ( add 5x to both sides )

5x + 3y = - 4 ← in standard form