Sarah thinks there will be 60 people at the party. show that the cost will be $1350

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Kai walked one and two-thirds of a mile on saturday and four and one-sixth of a mile on sunday. how many miles did kai walk?

Which is the standard form for this number? (2 x 10) + (5 x 1) + (8 x 1 10,000 )