Page 256 - Algebra 1

_p _ 8. Write 2 × 106 in standard notation. 9. Solve = 18 .
(37)
*10. Find the prime factorization of 140. (38)
*11. Mul_tiple Choice Which of the following expressions is the correct simplification (38) of 10x+5?
5
A 2x+5 B 2x+1 C 10x+1 D 5x
*12. Free Fall The function h = 40 - 16t2 can be used to find the height of an object (38) as it falls to the ground after being dropped from 40 feet in the air. Rewrite the
equation by factoring the right side.
*13. Write Explain how the Distributive Property and factoring a polynomial are related.
_
15. Biology The approximate diameter of a DNA helix is 0.000000002 meters.
(38)
*14. Generalize Ex_
6(x - 1)
6
plain why the algebraic fraction 6x - 1
can be reduced, and why
(38) the fraction 6 cannot be reduced. (37) Write this number in scientific notation.
(31) 3 21
Measurement A nanosecond is one-billionth of a second. Write this number in 17. Write 78,000,000 in scientific notation.
(37)
*18. Geometry A square has side length 6.04 × 10-5 meters. What is its area? (37)
3 4 16.
(37) scientific notation.
*19. The triangles are similar. Find the missing length. (36)
12
x
9 12
20. Multi-Step An adult brain weighs about 3 pounds.
(37) a. There are about 100 billion brain cells in the brain. Write this number in
scientific notation.
b. Divide the weight of an adult brain by the number of cells and find how many pounds one brain cell weighs. Write the answer in scientific notation.
*21. Analyze Find the x- and y-intercepts for y = 12x and explain how they relate to the (35) graph of the equation.
22. Fundraising Themathclubhasacarwashtoraisemoney.Outofthefirst40vehicles, (33) 22 are SUVs and 18 are cars. What are the odds against the next one being a car ?
*23. Justify Explain why the statement 3-2 = -6 is false. (32)
Lesson 38 241