Sin(a+b) + sin (a-b) = 2 sin a cos b

verify the identitiy

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Order the measurements from the least to the greatest. 2,720 ml , 24.91 l , 0.0268 kl