Page 248 - Algebra 1

Lesson Practice
Practice
Distributed and Integrated
Write each number in scientific notation.
(Ex 1)
a. 1,234,000. b. 0.0306.
c. Find the product. Write the answer in scientific notation.
(Ex 2)
(5.82 × 103)(6.13 × 1011)
d. Find the quotient. Write the answer in scientific notation.
(Ex3)__ (7.29 × 10-2)
e.
(Ex 4)
f.
(Ex 5)
(8.1 × 10-6)
Compare. Use <, >, or =.
4.56 × 109 5.2 × 108 __
3 × 105 1.3 × 105 .
Astronomy The speed of light is 3 × 108 meters per second. If Mars is 2.25 × 1011 meters from the Sun, how many seconds does it take light to reach Mars from the Sun? Write the answer in scientific notation.
Simplify each expression.
1. 18÷32 -5+2 2. 72 +42 +3 3. 3[-2(8-13)]
(4) (4) (4)
Simplify each expression by combining like terms.
4. 13b2 + 5b - b2 5. -3(8x + 4) + _1 (6x - 24)
(18)
*6. Write 7.4 × 10-9 in standard notation. (37)
*7. Write Explain how to recognize if a number is in scientific notation. (37)
*8. Write Explain why anyone would want to use scientific notation. (37)
*9. Multiple Choice What is (3.4 × 1010)(4.8 × 105) in scientific notation?
(37) A 1.632×1015 B 1.632×1016 C 16.32×1015 D 16.32×1016
*10. Physiology The diameter of a red blood cell is about 4 × 10-5 inches. Write this (37) number in standard notation.
11. The triangles shown are similar. Find the missing length. (36)
20
12. A student’s final grade is determined by adding four test grades and dividing by (26) 4. The student’s first three test grades are 79, 88, and 94. What must the student
make on the last test to get a final grade of 90?
(18) 2
18
12
Lesson 37
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