2 answers:
Answer:
1) 85.7%
2) 93%
3) 96.5%
4) 94%
Step-by-step explanation:
Sorry if any of these are wrong. I used the formula a/w= p/100. a is the part, w is the whole and p is the percent.
The formula for percent error is:
((Approximate value - exact value) / exact value) x 100
1) 14-12 = 2
2/12 = 0.1666
0.166 x 100 = 16.7% (Rounded to nearest tenth)
2) 231 - 215 = 16
16/215 = 0.74419
0.74419 x 100 = 7.4419% ( Round as needed)
3) 17.1 - 16.5 = 0.6
0.6/16.5 = 0.36364
0.36364 x 100 = 3.6364% (Round off as needed)
4) 1081 - 1150 = -69
-69/1150 = -0.06
-0.06 x 100 = -6% = 6% error
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Answer:
5:7
Step-by-step explanation:
There's 21 bottles total, and 15 plastic bottles.
15:21
Both 15 and 21 are divisible by 3.
15/3 = 5
21/3 = 7
5:7
The answers are..
6. 55
7. 6
8. 39
9. 17
Answer:
7,7
Step-by-step explanation:
Possibly 7,7 becuase p+q=pq, therefor 2,1+5,6=7,7
Answer:
$52.50
Step-by-step explanation:
She makes $7.50 an hour multiple that by 7 hours and you get $52.50
