If Carla would have bought 4 plants it would have been 13 dollars from green touch
If she would have bought them for the grocery store it would have been 14 dollars
So in conclusion she saved 1 dollar
Option 3
He can ride his bike 105 km. 30/2 is 15. 15*7 is 105.
:D
9^2/9^7
when dividing powers, we subtract the exponents
9^(2-7)
9^ (-5)
a negative exponent flips from the numerator to the denominator
1/ 9^5
Choice D