Will name brainliest 01:46:05 Coach DeCaro records the cross country runners’ times compared to their personal best times.

3K Times

Runner

Time compared to personal best

Gregor

+5.6

Hiroki

–11.6

Isabelle

+3.2

Juan

0

Karen

–5.2

Which list correctly orders the runners from MOST improved to LEAST improved?

Juan, Hiroki, Karen, Isabelle, Gregor

Juan, Isabelle, Karen, Gregor, Hiroki

Hiroki, Karen, Juan, Isabelle, Gregor

Gregor, Isabelle, Juan, Karen, Hiroki

the correct answers i think are b. and d.

give me brainliest if it is correct!

7.9m and 4.3°

step-by-step explanation:

let east be +x and north be +y, x = distance * cos θ, y = distance * sin θ  

for 3.5 south, y = -3.5  

for 8.2, x = 8.2 * cos 30 and y = 8.2 * sin 30  

for 15 west, x = -15  

total x = 8.2 * cos 30 – 15 ≈ -7.9  

total y = -3.5 + 8.2 * sin 30 = 0.6  

magnitude = [(8.2 * cos 30 – 15)^2 + 0.6^2)]^0.5  

the magnitude is approximately 7.9 m  

tan θ = y/x = 0.6/-7.9  

the angle is approximately 4.3˚ north of west