If melissa estimates she would read 250 but she read 290 what is the percent error

Translate the following words into an expression: “the quotient of a number and three is five.”

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

A25- foot ladder leans against a building and reaches a point of 23.5 feet above the ground .find the angle that the ladder makes with the building