Clinical literature reports that the duration of a typical cold is roughly 18 days. researchers wanted to know if people tend to underestimate the duration of a typical cold, on average. they surveyed a random sample of 352 healthy adults in georgia and asked them how long they think that a typical cold lasts. the researchers reported a 95% confidence interval of 6.9 to 8.2 days for the mean expected duration of typical cold. the researchers reported that the answers to this question were strongly right-skewed. the 95% confidence interval (6.9, 8.2) they obtained is

answer: 25.4 units

step-by-step explanation: radius = 12.7 units

diameter = twice the radius

diameter = 12.7 x 2

= 25.4

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