Exam 10: Rational Numbers

A child's temperature was 101.9°F during a visit to the pediatrician for an ear infection. Three hours after beginning the antibiotic prescribed by the doctor, the change in the child's temperature was -1.5°. What was the child's temperature after beginning the antibiotic?

The elevation, or height, of places on Earth is measured in relation to sea level, or the average level of the ocean's surface. The table below shows heights above sea level as a positive number and depth below sea level as a negative number. Find the difference in elevation between Mt. Aconcagua and Death Valley. Continent Highest elevation (in meters) Lowest elevation (in meters) Africa Mt) Kilimanjaro 5895 Qattara Depression -156 Asia Mt) Everest 8850 Dead Sea -411 Europe Mt) Elbrus 5642 Caspian Sea -28 America Mt) Aconcagua 6960 Death Valley -86

Simplify the following expression. $\left( \frac { 23 } { 39 } \right) \left( - \frac { 17 } { 44 } \right)$

The chart below shows the closing price of a share of stock on September 15, 2003, for each of five companies. Also shown is the change in price from the previous day. To find the closing price on the previous day, subtract the change in price from the closing price on September 15. Find the closing price on the previous day for General Mills. Company Closing Price Change in Price Del Monte Foods Co. 8)77 -0)06 General Mills, Inc. 47)10 -0)11 Hershey Foods, Inc. 72)57 +0)11 Hormel Foods Corp. 22)42 -0)08 Sara Lee Corp. 19)18 -0)21

A nurse's aide records the amount of liquid consumed by the residents on the second floor of an assisted living facility during each meal. Thirty-seven cups of liquid were consumed during supper. How many gallons of liquid were consumed by the residents on the second floor?

Find the temperature after a rise of 5 ${ } ^ { \circ } \mathrm { C }$ from -3 ${ } ^ { \circ } \mathrm { C }$ .

Simplify the following expression. $\left( - \frac { 8 } { 19 } \right) \div \left( - \frac { 1 } { 4 } \right)$

Simplify the following. $5 - ( 9 - 18 ) / 3$

On January 23, 1916, the temperature in Browning, Montana, was approximately $6.02 ^ { \circ } \mathrm { C }$ On January 24, 1916, the temperature was approximately $- 48.37 ^ { \circ } \mathrm { C } .$ Find the difference between the temperatures in Browning on these two days.

Find -21 less than 18.

Multiply: -13 . (25)

Place the correct symbol, < or >, between the two numbers. -68 ____ 99

Add: 3 + (-3) + 3 + (-15)

Hypothermia begins when a person's core body temperature falls below 95°. A patient in the emergency room has a core body temperature 3.5° below the normal body temperature of 99°. Is this patient suffering from hypothermia?

The combined scores of the top twelve golfers in a tournament equaled -48 (48 under par). What was the average score of the twelve golfers?

Divide: (-78) $\div$ (-13)

Subtract -22 from -1.

Find the sum of -9, -5, and 13.

Subtract: 6 - (-15)

The pH scale is used to indicate the acidity of a solution based on the concentration of hydrogen ions in the solution. The scale ranges from 0 to 14, and solutions with low pH numbers are more acidic than those with high pH numbers. Apple juice is a acidic solution with a pH of 3.3, indicating that it contains 1 × $10 ^ { - 3 }$ g of hydrogen ions per liter. Write this number in decimal form.