Jamal's lawn is shaped like a square with an area of 224.99 Ft squared which measurement is closest to the side of length of his lawn in feet A 15ft
B 56ft
C 28ft
D 11ft

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Renee hiked for 6 3 /4 miles. after resting, renee hiked back along the same route for 5 1 /4 miles. how many more miles does renee need to hike to return to the place where she started? represent your answer as a simplified mixed number, if necessary.

Me with these questions , i don’t understand scientific notation!