To start, you have $63.75. You earn additional money babysitting. Then you purchase a new pair of shoes for $109.99. You now have $83.76. left. How much money do you earn babysitting? Write and solve an equation to represent this situation.

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.