Simplify the expression and state excluded values: 28ab^3/16a^2b (last b isn't part of the exponent)

Asalesperson earns $320 per week plus 8% of her weekly sales. the expression representing her earnings is 320 + 0.08x. which of the following describes the sales necessary for the salesperson to earn at least $1000 in the one week?

For a field trip to the zoo, 4 students rode in cars and the rest filled nine busess. how many students were in each bus if 472 students were on the trip

Solve 2^x=32 and rewrite this equation in a logarithmic form