In a dance competition, each dancer’s score is determined by deducting 1

3

point for each

error from a maximum score of 10 points.

If Maya makes eight errors during her

dance, what will her score be?

A. exactly 2.7

B. exactly 7.3

C. between 2.66 and 2.67

D. between 7.33 and 7.34

Maria donates a fixed amount, a, to a charity each month. if she donates $300 in 12 months, what is the equation for a? a. a + 300 = 12 b. a × 300 = 12 c. a × 12 = 300 d. a + 12 = 300 e. a + 32 = 100

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.