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Marta_Voda [28]
3 years ago
8

Ed buys a vase for £24 and adds 25% onto the price before putting it onto his shop window

Mathematics
1 answer:
irakobra [83]3 years ago
6 0
The answer is 30.

( See picture for equations )
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a boat is traveling at an average speed of 15 meters per second. how many kilometers per minute is the boat traveling?
lukranit [14]
We know that 1 meter is 0.001 km and that 1 minute is 60 seconds.
To transform 15m/s we into km/min we have to multiply 15 by 0.001 and multiply it by 60.
15*0.001*60=0.0015*60=0.09 km/min  - its the answer
4 0
3 years ago
Read 2 more answers
2.<br>2x2 + 2x - 112 factor​
Angelina_Jolie [31]

Answer:

Use order of operation

Step-by-step explanation:

7 0
3 years ago
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Petra jogs 5 miles in 40 minutes. At this rate, how long would it take her to jog 7 miles? Petra would take minutes to jog 7 mil
tatuchka [14]

Answer:

the answer would be 56 minutes.

Step-by-step explanation:

7 x 40 = 280

5n = 280

n = 56

3 0
3 years ago
5. Based on recent results, scores on the SAT test are normally distributed with a mean of 1511 and a standard deviation of 312.
Mekhanik [1.2K]

Answer:

The actual SAT score is 2024.

The equivalent ACT score is 29.49.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

SAT score that is in the 95th percentile

Scores on the SAT test are normally distributed with a mean of 1511 and a standard deviation of 312, which means that \mu = 1511, \sigma = 312

95th percentile is X when Z has a pvalue of 0.95, so X when Z = 1.645. The score is:

Z = \frac{X - \mu}{\sigma}

1.645 = \frac{X - 1511}{312}

X - 1511 = 1.645*312

X = 2024

The actual SAT score is 2024.

Equivalent ACT score:

The equivalent ACT score is the 95th percentile of ACT scores.

Scores on the ACT test are normally distributed with a mean of 21.1 and a standard deviation of 5.1, which means that \mu = 21.1, \sigma = 5.1. So

Z = \frac{X - \mu}{\sigma}

1.645 = \frac{X - 21.1}{5.1}

X - 21.1 = 1.645*5.1

X = 29.49

The equivalent ACT score is 29.49.

5 0
2 years ago
3.1 .31 1.3 .13 from least to greatest
katen-ka-za [31]
Hello there!

The answer is:
.13
.31
1.3
3.1
8 0
3 years ago
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