ast year, Sara's piano teacher charged $40 per hour for private lessons. This year, the teacher increased her rates by 10%. How much is the teacher charging per hour for lessons this year?

i think it would be 42cm

x equals 1

step-by-step explanation:

f(4)=f(×)

x=1

chemists are often responsible for designing a chemical reaction and analyzing the products obtained from it. one significant part of designing a chemical reaction is determining the amount of each reactant that is needed and the amount of each product that will be produced. in order to do so, chemists use stoichiometry, the quantitative relationships between reactants and products.