Mrs Hart 8th grade math

irrational numbers

100

what is an irrational number?

a non-terminating and non-repeating decimal

200

what is the most popular irrational number?

pi/3.1415...

300

which number is the biggest:

square root of 7

2.8

square root of 2

2.8

400

is the square root of 19 closer to 4 or 5?

4

500

what is the square root of twelve times the square root of twelve? 

12

exponents

100

what is 9²+3³?

108

200

what is the cubed root of 729?

9

300

what is 4¹²x4²⁰?

4³²

400

what is ((7³)⁴)?

7¹²

500

what is 3²x3^-5 with a positive integer?

1/3³

formulas

100

what is the formula for a cylinder?

V=1/3πr²h

200

what is the formula for slope intercept form?

y=mx+b

300

what is the equation for standard form?

ax+by=c

400

what is the Pythagorean theorem?  

a²+b²=c²

500

what is the volume of a sphere?

V= 4/3πr³

sample problems

100

what is 0.162162162... as a fraction?

54/333

200

if b=8 and c=10 what is a?

a=6

300

what is (a²)^-3?

a^-6

400

what is the mean of 2, 4, 3, 6, and 2?

3.4

500

if (x+1)8=56 what is x?

6