Log(14/15)+log(28/27)+log(405/196)= ? Please! someone solve this...

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

What is the value of x? enter your answer in the box.

Aculinary club earns $1360 from a dinner service. they sold 45 adult meals and 80 student meals. an adult meal costs twice as much as a student meal. what is the cost of an adult meal?