The equation d = 1/5 where d represents the distance in miles and t is the number of seconds between seeing lightening and hearing thunder, tells hc far away a thunderstorm is. How far is it to a thunderstorm if you count 15 seconds between seeing the lightening and hearing the thunder??? please help !

21

jk it's 20

step-by-step explanation:

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh

arc length = radius * x ( in radians)

6 * pi = 18 * x

divide by 18 on each side

6 pi / 18 = x

pi/3 = x

the angle is pi / 3 radians

or   60 degrees

the answer is  

d.

21

i did this one. so you should get it right.