Fun With Math Session 1

The scatterplot shows the costs to run a 30 second (sec) advertisement during a major sporting event from 1970 to 2010, where x is years since 1970 and c is the cost, in thousands of dollars. The curve of best fit is also shown. Based on the curve of best fit, which of the following is a true statement?

• The cost to run a 30 sec advertisement during this sporting event in 1970 was about $1.1 million.

• The cost to run a 30 sec advertisement during this sporting event in 2010 was about $1.1 million.

• Between 1970 and 2010, the cost to run a 30 sec advertisement during this sporting event increased by about $110,000 each year.

• Between 1970 and 2010, the cost to run a 30 sec advertisement during this sporting event increased by about 10% each year.

Let y = a and y = b be solutions to the equation. What is the value of a * b? 0 = (2y−1)(6−y)

• Half

• One

• Three

• Six

The sector of a circle shown has its center at point A. The length of AC is 8. Line segments AD and BC are perpendicular and intersect at point E such that DE has length 1. What is the length of chord BC?

• 2√15

• 7

• 2√17

• 8

The KJR FM radio station typically plays classic rock and pop at a ratio of 2:1 rock to pop. About how many minutes of pop do they play per hour?

• 10

• 20

• 30

• 40

• a. The functions have the same vertex

• b. The functions have the same axis of symmetry

• c. The functions have the same maximum

• d. The functions are both 2nd degree polynomials

Which of the following describes the solutions to this inequality:

• a. -18 ≤ s ≤ 0

• b. -6 ≤ s ≤ 0

• c. s ≤ 0 or s ≥ 6

• No solution

Which of the following is equivalent to the complex number shown?

• 320 - 146i

• 68

• 480 - 120i

• 544 - 136i

You should use your calculator for every question on the SAT

• TRUE - It has a calculator throughout for a reason!

• TRUE - It’s always smart to check every answer with your calculator.

• FALSE - Not every math question can or should be solved using a calculator.

• FALSE - The SAT tests fundamental algebraic concepts that don’t need a calculator.

If (x,y) is a solution to the system of equations shown, which of the following are x-coordinates of the solutions?

• 5/2 and -1

• -5/2 and -1

• 5/2 and -11/2

• -5/2 and 11/2

Mary takes 15 minutes to ride her bike to school. The graph of the function that models her ride is shown, where x is the time, in minutes, and y is the distance, in miles. The graphs are divided into time intervals A, B, and C. What statement is true about her ride?

• She stopped for an interval of time

• She rode slower in interval B than in interval C

• She lives 0.7 miles from school

• She rode her bike fastest in interval A, as compared to the rest of her ride