Question

1. (a) write 0.0000242 in scientific notation

(b) write 5.61 x 10 -6 (ten to the negative 6)

2. (a)Write eight ten-thousandths in scientific notation

(b) Write 4.8 x 10-2 (ten to the negative 2)

3. Simplify 3-3 (three to the negative 3)

4. What is the distance from -75 to zero on a number line?

5. The y-axis is a line of symmetry for a triangle. The coordinates of two of its vertices are (-4,6) and (0,-2). What are the coordinates of th third vertex?

6. The y-axis is a line of symmetry for a triangle. The coordinates of two of its vertices are (-6,-2) and (0,3) What are the coordinates of the third vertex?

4. What number is 80% of 45?

Answer 1

1)

(a)scientific notation of 0.0000242 is 2.42 x 10^-5

(b) 5.61 x 10^-6 it self is scientific notation of number 0.00000561

2)

(a)

eight ten-thousandths in scientific notation is 8 x 10⁴

(b)

4.8 x 10^-2=0.048

3)

3^-3=(1_/3³)=(1_/27)

4)

distance from -75 to zero =0-(-75)

distance from -75 to zero is 75

5)

y-axis is a line of symmetry for a triangle

coordinates of the third vertex =(4,6)

6)

y-axis is a line of symmetry for a triangle

coordinates of the third vertex =(6,-2)

4)

80% of 45 =(80_/100)*45

=>80% of 45 =(4_/5)*45

=>80% of 45 =4*9

=>80% of 45 =36

80% of 45 is 36

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