10: On an auto trip a car traveled 148.2 miles in 4 hr. 20 min. What was the speed in mi. per hr.?
34.2
27.6
38.8
35.7
11: A steel plate is measured to be .025 inch thick. Fifteen of these plates are put together. However, if each plate were actually .001 in. less thick than its first measurement, what would the total thickness be?
0.3075
0.325
0.34
0.36
13: 13/20 = 30%
True
False
Both
Neither
15: 3/5 = 40%
True
False
Both
Neither
2007-04-25 01:50:34 · 3 answers · asked by heather n 1 in Science & Mathematics ➔ Mathematics
10. 4 hr 20 min = 4.33 hr
Then 148.2/4.33 = 34.22 mi/hr
11. Actual thickness is 0.025-0.001 = 0.024
Now 15 x 0.024 = 0.36 in
12. 13/20 = (13 / 20) x 100% = 65%
False
13. 3/5 = (3/5) x 100% = 60%
False
2007-04-25 02:18:29 · answer #1 · answered by looikk 4 · 1⤊ 0⤋
Convert 4hours 20 minutes to hours decimal
divide 20 by 60 to get the decimal
20 / 60 = 1/3
or .33333333
divide 148.2 by 4.33333333
148.2 / 4.333333333 = 34.2 mph
The speed of the auto is 34.2 mph
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2007-04-25 10:30:11 · answer #2 · answered by SAMUEL D 7 · 0⤊ 0⤋
10) 34.2mph
11)0.36 inches
13)False.It would be 65%
14)False.It would be 60%
2007-04-25 09:28:13 · answer #3 · answered by alpha 7 · 0⤊ 0⤋