SA=4pir^2
78.54km^2=SA
78.54=4pir^2
divide both sides by 4
19.635=pir^2
aprox pi=3.14 so divide both sides by 3.14
6.25318=r^2
sqrt both sides
2.50063=r
round
radius=2.5km
this question is flawed in that it gives the wrong units
answer is the option with 2.5 in it
2nd one
B) 0.6%
The periodic interest rate is found by dividing the annual interest rate by the number of times per year it is compounded.
7.5/12 = 0.625, rounded to 0.6.
5:6 is your ratio because it says 5 and 6 and put them in the ratio.
Distance can’t be negative so add the distance and it’s 19m time is 11min distance/time is velocity her velocity was 1.72m/min