Real Number System
A student claims √121 is irrational number because it is a square root.
Is the student correct? Justify.
Incorrect. √121 = 11, which is rational (perfect square).
Between which two whole numbers is √90 located?
Between 9 and 10
Which number is written correctly in scientific notation?
A. 12.4 × 10³
B. 4.09 × 10⁻²
C. 0.75 × 10⁵
B. 4.09 × 10⁻²
What was our warm-up yesterday ?
Guess the word activity
This is the value of π (pi) rounded to four decimal places
3.1416
Classify √50 into all sets it belongs to:
Natural, Whole, Integer, Rational, Irrational, Real
Irrational, Real
Simplify √144 – √36
12 – 6 = 6
Write 0.00504 kilometers in scientific notation and explain your exponent
5.04 × 10⁻³ kilometers
Fill in the blank with the correct inequality symbol
√95 ______ 9.1
√95
Solve: 3(x − 4) = 18
x=10
Which statement is true?
A. All terminating decimals are irrational
B. All repeating decimals are rational
C. All square roots are irrational
D. All integers are natural numbers
B. All repeating decimals are rational
Without a calculator which value is greater: √50 or 7?
√50~ 7.07
The average distance from the Earth to the Sun is about
1.496 × 10⁸ kilometers.
Write this in standard form.
149,600,000 km
√25 best fits ?
Natural numbers
This is the slope of a line that rises 4 units and runs 2 units.
m=2
The number –√36 best fits in which category?
Integer (whole numbers that are positive or negative)
Without a calculator, determine which one is greater: 14.1 or √200
√200
A marine biologist discovered a new species of plankton. Its diameter was measured to be 0.00035 meters. Write this diameter in scientific notation.
0.00035=3.5×10-4
Evaluate
10 + √169
-10
The area of a triangle with a base of 10 units and a height of 6 units is this.
30 square units
Order from least to greatest:
–√75, –8.6, –√64, –8.7
Answer: –8.7, –8.66, –8.6, –8
A square has a side length of √32. Is the perimeter the square rational or irrational ?
Irrational
√32=5.657
A city A has 2.5 × 10⁵ residents, and city B has 1.8 × 10⁵ residents.
Which city has more people?
City A has more people
2.5 × 10⁵ = 250,000
1.8 × 10⁵ = 180,000
How many questions did we x out from the review?
3
Formula for the Area of a circle
A = π r²