A book which was bought for Rs.100 was sold at Ra.90 what will be the loss percent?​

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

Julie was able to walk 16 km through the zoo in 6 hours. how long will it take her to walk 24 km through the zoo?