Two students are using the distance formula to determine the distance between (9,4) and (-3,8) on the coordinate grid.

Step-by-step explanation:

R = 6373.0

lat1 = 52.2296756

lon1 = 21.0122287

lat2 = 52.406374

lon2 = 16.9251681

dlon = lon2 - lon1

dlat = lat2 - lat1

a = (sin(dlat/2))**2 + cos(lat1) * cos(lat2) * (sin(dlon/2))**2

c = 2 * atan2(sqrt(a), sqrt(1-a))

distance = R * c

print "Result", distance

print "Should be", 278.546

here you hope this .

step-by-step explanation:

hypotenuse = √(15² + 8²)

=  √(225 +64)

=  √(289) = 17

sin(x) = cos(y) = 8/17

they are identical so long as you are doing the sine of one angle and the cosine of the only other angle that isn't the right angle.

26 is 33.33% of 78

step-by-step explanation:

26 is what percent of 78?

26 is p% of 78

equation: y = p% * x

solving our equation for p

p% = y/x

p% = 26/78

p = 0.3333

convert decimal to percent:

p% = 0.3333 * 100 = 33.33%