INTEGER

MATERI ESP MINGGU 8

Word Problems

1. Katherine is very interested in cryogenics (the science of very low temperatures). With the help of her science teacher she is doing an experiment on the affect of low temperatures on bacteria. She cools one sample of bacteria to a temperature of -51°C and another to -76°C. What was the temperature difference in the two experiments?

A)-127
B)25
C)127
D)-25

2. On Tuesday the mailman delivers 3 checks for $5 each and 2 bills for $2 each. If you had a starting balance of $25, what is the ending balance?

A)-26
B)36
C)26
D)6

3. You owe $225. on your credit card. You make a $55. payment and then purchase $87 worth of clothes at Dillards. What is the integer that represents the balance owed on the credit card?

A)-257
B)-367
C)367
D) 257

4. If it is -25F in Rantoul and it is 75F in Honolulu, what is the temperature difference between the two cities?

A)100
B)-50
C)50
D)-125

5. A monkey sits on a limb that is 25 ft above the ground. He swings up 10 ft, climbs up 6 ft more then jumps down 13 ft. How far off the ground is the monkey now?

A)28ft
B)31ft
C)54ft
D)25ft

6.  Mary has $267 in her checking account. She writes checks for $33, $65, and $112. What is the balance in her account now?

A)57
B)-67
C)67
D)-57

7.  A submarine dove 836 ft. It rose at a rate of 22 ft per minute. What was the depth of the submarine after 12 minutes?

A)-472ft
B)572ft
C)452ft
D)472ft