Name:
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Pg. 28 #14-20
#14 a) -5(7)= b) 9(5) = c) -8 (-8)= d) 12 (-4) =
#15 Show how to find 4 (-2) using the number line.
#16 a) (−1) 2
= b) (−1) 3
= c) (−1) 4
= d) (−1)
5
= e) Write a rule you can use to evaluate -
1 to any power. If the exponent is even, the answer is
______________________. If the exponent is odd, the answer is
___________________________.
#17 A Navy submarine descended from sea level at a rate of 7 feet per second.
A) Write the descent rate as an integer.
B) Find the submarine’s elevation after
10 minutes.
#18 In golf, par is a score of zero. One golfer scored 3 under par each day in a
4-day tournament.
A) Write the golfer’s daily score as an integer.
B) Find the golfer’s final score for the entire tournament.
#19 Frances has no money in her checking account. She writes 3 checks for $35 each. The bank charges her a $15 penalty because she has overdrawn her account. What is the balance of her bank account now?
#20 A hot-air balloon leaves the ground and ascends at a rate of 6 feet per second for 3 minutes. Then it descends at a rate of 3 feet per second for 2 minutes.
Finally, it ascends at a rate of 4 feet per second for 5 minutes. How far above the ground is the balloon now?
Pg. 30 #6, 7, 10,11
#6
#7 a) 24 ÷ (-6)= b) 40 ÷ 8= c) -49 ÷ (-7)= d) -36 ÷ 4
Simplify. a) b)
-
25
5
−25 c)
5
25
−5 d) Does it matter where the negative sign is placed? Do you get the same answer all 3 times?
#10 The temperature of a pot of water fell from 72 degrees to 36 degrees in 4 minutes. Find the change in temperature per minute.
#11 The price of one share of stock in
BadINvestment.com plunged 14 points in 4 weeks. Find the change in stock price per day.