Measurement Examples And Worksheet - A-64 Appendix 5 Page 33
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36A-95
V.3 Converting between American and Metric Units
Self Check 6
6
EXAMPLE
Bathing
Warm
bath
water
is
90 F. Express
this
Hot coffee is 110 F.
COFFEE
temperature in degrees Celsius. Round to the nearest tenth of a degree.
Express this temperature in
5
Strategy
We will substitute 90 for F in the formula
C
(F
32)
.
degrees Celsius. Round to the
9
nearest tenth of a degree.
WHY
Then we can use the rule for the order of operations to evaluate the right
side of the equation and find the value of C, the temperature in degrees Celsius of
Now Try
Problem 33
the bath water.
Solution
1F
32 2
5
4
C
This is the formula to find degrees Celsius.
5
8
9
5
190
32 2
5
290
Substitute 90 for F.
9
1582
5
Do the subtraction within the
32.22
parentheses first: 90
32
58.
9
9 290.00
27
a
b
5
58
58
20
Write 58 as a fraction: 58
.
1
9
1
18
290
20
Multiply the numerators.
Multiply the denominators.
18
9
20
32.222 . . .
Do the division.
18
32.2
2
Round to the nearest tenth.
To the nearest tenth of a degree, the temperature of the bath water is 32.2 C.
Self Check 7
7
EXAMPLE
Dishwashers
A dishwasher manufacturer recommends
To determine whether a
FEVERS
that dishes be rinsed in hot water with a temperature of 60 C. Express this
baby has a fever, her mother
temperature in degrees Fahrenheit.
takes her temperature with a
9
Strategy
We will substitute 60 for C in the formula
F
C
32
.
Celsius thermometer. If the
5
reading is 38.8 C, does the baby
WHY
Then we can use the rule for the order of operations to evaluate the right
have a fever? (Hint: Normal
side of the equation and find the value of F, the temperature in degrees Fahrenheit
body temperature is 98.6 F.)
of the water.
Now Try
Problem 37
Solution
9
F
C
32
This is the formula to find degrees Fahrenheit.
5
60
108
1602
9
9
5 540
32
Substitute 60 for C.
5
540
5
1
2
540
4
9
9
60
540
32
Multiply:
(60)
.
0
5
5
1
5
5
40
108
32
Do the division.
40
140
Do the addition.
0
The manufacturer recommends that dishes be rinsed in 140 F water.
ANSWERS TO SELF CHECKS
1.
2.
3.
4.
30 in.
the 550-yard race
30, 845 g
the person who weighs 76 kg
5.
6.
7.
0.4 qt
43.3°C
yes
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0 votes
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