Page 150 - Math Course 1 (Book 1)
P. 150
Standard Form and Scientif c Notation
Express 0.0119 in scientif c notation. Express 0.00042 in scientif c notation.
0.0119 = 1.19 × 0.01 The decimal point moves 2 A. 42 × 10 –5
places. –4
B. 4.2 × 10
= 1.19 × 10 The exponent is negative. C. 4.2 × 10 4
–2
D. 4.2 × 10 –3
Answer 1.19 x 10 –2 Answer
Your Turn!
Express Numbers in Standard Form MO. 4 - L7b
6
Express 2.614 × 10 in standard form. Comparing Numbers in
Scientif c Notation
A. 2,614,000
B. 261,400
C. 0.000002614
D. 0.002614
Let’s Begin
Answer
REAL WORLD EXAMPLE
Express 8.03 × 10 –4 in standard form. SPACE
The table shows the planets and
A. 80,300 their distances from the Sun.
B. 8.030 Estimate how many times farther
C. 0.000803 Pluto is from the Sun than Mercury is
D. 0.0803 from the Sun.
Answer Planet Distance from the sun (km)
Mercury 5.80 x 10 7
Venus 1.03 x 10 8
Express Numbers in Scientif c Notation Earth 1.55 x 10 8
Mars 2.28 x 10 8
Express 65,000 in scientif c notation.
Jupiter 7.78 x 10 8
A. 6.5 × 10 5 Saturn 9
B. 6.5 × 10 –4 1.43 x 10
C. 6.5 × 10 4 Uranus 2.87 x 10 9
D. 65 × 10 3 Neptune 4.50 x 10 9
Pluto 5.90 x 10 9
Answer
Explore
9
The distance from the Sun to Pluto is 5.90 × 10
km and the distance from the Sun to Mercury is
7
5.80 × 10 km.
142
