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Arisa [49]
3 years ago
7

Help i will mark it brainliest if its correct question is in picture :)

Mathematics
2 answers:
oee [108]3 years ago
5 0

Answer:

Part A          25 miles per galloon  

Part B            225

Step-by-step explanation:

Vanyuwa [196]3 years ago
3 0

Answer:

Step-by-step explanation:

25 miles per gallon

225 for 9 gallons

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Lana finished the race in 13.2 seconds . If 84 other girls ran in the event, approximately how many runners did she beat?
BabaBlast [244]

Complete question :

The 100m dah times in the girl's track meet were normally distributed with a mean of 13 seconds and a standard deviation of 0.3 seconds.

Lana finished the race in 13.2 seconds . If 84 other girls ran in the event, approximately how many runners did she beat?

Answer:

21 runners

Step-by-step explanation:

Mean, μ = 13 seconds

Standard deviation, σ = 0.3

Lana's race time = 13.2

We find the proportion of runners who had race time above 13.2 ;

Proportion of who had race tune above 13.2

P(x > 13.2)

Obtain the Zscore

Zscore = (x - μ) / σ

Z = (13.2 - 13) / 0.3

Zscore = 0.2 / 0.3 = 0.6667

P(Z > 0.6667) = 0.25239 (Z probability calculator)

This is about 0.25239 * 100 = 25.24% = 25% (nearest percent)

Hence, Number of runners Lana beat = 25% of total runners ;

0.25 * 84 = 21

Hence, Lana beat about 21 runners

6 0
3 years ago
Fifteen hungry kittens found a bucket of sausages. Each time
raketka [301]

Answer:

2.4 SAUSAGES

Step-by-step explanation:

18 x 2 = 36

36/ 15 = 2.4

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2 years ago
after 1 year on the job M got a raise from $10.50 to $11.13 per our. What was the percent increase of her hourly wage
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The answer is 6% increase

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