CONSUMER ARITHMETIC
A shirt is on sale for 20% off its original price of $50. How much will you pay for the shirt?
$50 x 0.20= $10 (discoun)
$50 - $10= $40
A right triangle has a hypotenuse of 5 and an adjacent of 4. What is the opposite?
3
2x + 5 = 11
What is the value of x?
x = 3
Find the derivative of f(x) = 3x2 + 2x - 5
6x + 2
Who is credited with developing the Pythagorean theorem?
Pythagoras
You want to leave a 15% tip for a meal that costs $40. How much should you tip?
$40 x 0.15=$6.00 tip
Find the sine of 30 degrees
0.5
Find the derivative of f(x) = sin(x) + cos(x)
cos(x) - sin(x)
What is the name of the mathematical field that deals with the study of shapes and sizes?
Geometry
A pair of shoes originally costs $100 and is now on sale for $80. What is the discount rate?
$100-$80=$20.00
$20/100x100=20%
In a right triangle the length of the adjacent is 3 and the length of the hypotenuse is 5. Find the sine of the angle.
4/5
What is the name of the graph of a quadratic function?
Parabola
You deposit $1000 into a savings account that earns 2% interests per year. How much interest will you earn in one year?
$1000 x 0.02=$20.00 interest
You invest $5000 into an account that earns 4% per annum, compounded annually. How much will you have in the account after 3 years?
Year 1: $5000 x 1.04=$5,200.00
Year 2: $5200 x 1.04=$5,408.00
Year 3: $5408 x 1.04=$5624.32
What is a vector?
A quantity with both magnitude and direction