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3 years ago

Which is faster a car driving at a rate of 40 kph or a car at driving at a rate of 15 metres a second

Mathematics

1 answer:

LuckyWell [14K]3 years ago

7 0

40 kph is equal to abt 11 mps so that means 40kph is faster

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Assume that women have heights that are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches.

Maurinko [17]

Answer:

Q3 = 65.7825.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 63.6, \sigma = 2.5$

Find the value of the quartile Q3. (Hint: Q3 has an area of 0.75 to its left.)

This is the value of X when Z has a pvalue of 0.75. So it is X when Z = 0.675.

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

$0.675 = \frac{X - 63.6}{2.5}$

$X - 63.6 = 0.675*2.5$

$X = 65.7825$

Q3 = 65.7825.

3 0

3 years ago

What is the value of x? 20 35 60 70

aksik [14]

Answer:

its 60. u gotta know this stuff man

3 0

4 years ago

Read 2 more answers

Which of the following is an example of a proper fraction?

nirvana33 [79]

The numbers should be less than the denominator, therefore i think it's 5/9 , because the rest have a numerator greater than the denominator, even the 3 . it's written as 3/1 and 3 >1.

4 0

3 years ago

At River Bank, checking account customers earn 0.75% interest a month on their account balances, pay no service fees for writing

vlada-n [284]

Solution:

1. Account balance of customer= $ 1,000

Interest earned in checking account= 0.75%

Financial charge= $ 2

So, income earned in one month on the checking account

= 0.75% of 1,000 - $ 2

$=\frac{0.75}{1,00\times 100}\times 1,000 -2\\\\=7.50-2\\\\=5.50$

Option (B) $ 5.50

2. Checking account earnings at Baker’s Bank (I) = -0.09 x + 10.2

The earnings at Elite Bank are modeled by: I = -0.02 x + 7.5

The number of checks when Elite Bank start generating more checking account income than Baker's Bank is given by inequality,

→→ -0.02 x +7.5 > -0.09 x +10.2

→→ -0.02 x + 0.09 x > 10.2 - 7.5

→→0.07 x > 2.7

→→ $x>\frac{2.7}{0.07}\\\\ x>\frac{270}{7}\\\\ x>38 \frac{2}{7}$

So, the number of checks should be a whole number.

So, when number of checks = 39,→→Option (C) Elite Bank will start generating more checking account income than Baker's Bank.

3. Total amount in Emilio's checking account at the end of the week=( Beginning Balance= $ 728.32) -[4 Checks=( 99.48 +33.50 +18.23 +72.05)]+ $ 1109.90(Paycheck amount)

= 1109.90 + 728.32 - 223.26

= $1614.96 →→ Option (D)

7 0

4 years ago

8 pls pls pls pls pls pls

Fed [463]

Answer: y=-x+8

Step-by-step explanation:

7 0

3 years ago