8.2 i think. I am so sorry if i’m wrong
Answer:
45.7 s
Step-by-step explanation:
Darya:
Number of laps = 13
Average time per lap = 23.5 seconds
Total time to swim 13 laps = Number of laps × Average time per lap
= 13 × 23.5
= 305.5 seconds
Kana:
Number of laps = 10
Average time per lap = 25.98 seconds
Total time to swim 10 laps = Number of laps × Average time per lap
= 10 × 25.98
= 259.8 seconds
It took longer for Darya to swim
13 laps than for Kana to swim 10 laps.
How much longer?
= 305.5 seconds - 259.8 seconds
= 45.7 seconds
Answer:
75°
Step-by-step explanation:
Δ on left is 60-80-40°
Δ on right is 30-75-75°
the ∡ with the question mark has to be 75° also since it is vertical with the angle opposite it, which is also 75°
