Jacks average in math for the first nine weeks was an 88. his second nine weeks averange deceased to 81. what is the is the percent of change from the first nine weeks to the second? label increase or decrease

Sorry guys but as you have a small brain

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

What is the base of 1/9 to the power of 2