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3 years ago

16 POINTS PLZ HELP ME I AM TRYING TO MULTI TASK

Mathematics

1 answer:

Darya [45]3 years ago

3 0

2. 3 whole number box
0.6 for the dividend
4.4 on the top of the divided box
1/3 for the first /
0.6/2.64 for the second /
4.4 for the box above the estimate one
Yes for the estimate question

A. 32.58
B. 23.4
C. 0.9

I really hope this will help your sister hope she feels better *smiles*

Sorry if I got these wrong

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sound travels 1,500 m/s through water at 25 degrees celciesunder these conditions how long would it take to travel 300m

Fantom [35]

Answer: it would take 18,00 M/S

Step-by-step explanation:

First you have to fined the unit rate

1,500/25= 60

Now your gonna do

300x60= 18,00

3 0

3 years ago

Read 2 more answers

Brenda is cooking couscous. The recipe says she requires 480 grams of couscous for 4 people. How many will she need for 14?

alexgriva [62]

Answer:

$1,680\ g$

Step-by-step explanation:

we know that

Brenda requires 480 grams of couscous for 4 people

using proportion

Find out how many grams of couscous she requires for 14 people

Let

x -----> the amount of grams

$\frac{480}{4}\frac{g}{people}=\frac{x}{14}\frac{g}{people} \\\\x=14*480/4\\\\x=1,680\ g$

4 0

3 years ago

The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 460 seconds and a

AlekseyPX

Answer:

The time that the boys need to beat in order to earn a certificate of recognition from the fitness association is 511.264 seconds.

Step-by-step explanation:

We are given that the time for this event for boys in secondary school is known to possess a normal distribution with a mean of 460 seconds and a standard deviation of 40 seconds.

The fitness association wants to recognize the fastest 10% of the boys with certificates of recognition.

Let X = time for this event for boys in secondary school

SO, X ~ Normal( $\mu=460,\sigma^{2} =40^{2}$ )

The z-score probability distribution for normal distribution is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1)

where, $\mu$ = mean time = 460 seconds

$\sigma$ = standard deviation = 40 seconds

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) 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.

Now, it is given that the fitness association wants to recognize the fastest 10% of the boys with certificates of recognition, which means;

P(X > x) = 0.10 {where x is the required time which boy need to beat}

P( $\frac{X-\mu}{\sigma}$ > $\frac{x-460}{40}$ ) = 0.10