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larisa [96]
3 years ago
14

A car moves at 45 miles per hour. The time and the distance it travels are recorded.

Mathematics
1 answer:
irinina [24]3 years ago
4 0

Answer:

the distance

Step-by-step explanation:

More time care travels, more distance it goes. So distance depends of the time.

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One thousand and twenty students participated in the school math contest.
Tema [17]

Answer:

sample 1: 75

sample 2: 86

Step-by-step explanation:

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2 years ago
3.1 , 3.4 , 3.25 , 3.33 from greatest to least
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Answer:

3.1  3.25   3.33   3.4

Step-by-step explanation:

4 0
3 years ago
An item that was selling for $80 is reduced to $42. Find the percent decrease in
Westkost [7]

Answer:

47.5%

Step-by-step explanation:

You have to first subtract 80 and 42 to find the decrease first. This is 38. Now, you have to divide this by the original number which is 80. So 38 divided by 80 is 0.475.

Now multiply this by 100.

You can easily move the decimal point to the right.

So you would get 47.5%

Hope this helped!

3 0
3 years ago
Which fraction is equivalent to -(7/8) ?<br>​
tia_tia [17]

Answer: − 0.875

Because you just turn -0.875 into a decimal: To convert a fraction to a decimal, divide the numerator by the denominator. If required, you can use a calculator to do this.

6 0
3 years ago
The clearance between a pin and the collar around it is important for the proper performance of a disc drive for small computers
hichkok12 [17]

Answer:

(a) The distribution of (Y - X) is <em>N</em> (0.001, 0.0005).

(b) The probability that the pin will not fit inside the collar is 0.023.

Step-by-step explanation:

The random variable <em>X</em> is defined as the diameter of the pin and the random variable <em>Y</em> is defined as the diameter of the collar.

The distribution of <em>X</em> and <em>Y</em> is:

X\sim N(0.525, 0.0003)\\Y\sim N(0.526, 0.0004)

The random variables <em>X</em> and <em>Y</em> are independent of each other.

(a)

Compute the expected value of (Y - X) as follows:

E(Y-X)=E(Y)-E(X)=0.526-0.525=0.001

The mean of (Y - X) is 0.001.

Compute the variance of (Y - X) as follows:

V(Y-X)=V(Y)+V(X)-2Cov(X,Y)\\=V(Y)+V(X);\ X\ and\ Y\ are\ independent\\=0.0003^{2}+0.0004^{2}\\=0.00000025

SD(Y-X)=\sqrt{0.00000025}=0.0005

The standard deviation of (Y - X) is 0.0005.

Thus, the distribution of (Y - X) is <em>N</em> (0.001, 0.0005).

(b)

Compute the probability of [(Y - X) ≤ 0] as follows:

P(Y-X\leq 0)=P(\frac{(Y-X)-\mu_{Y-X}}{\sigma_{Y-X}}\leq \frac{0-0.001}{0.0005})=P(Z

*Use a <em>z</em>-table for the probability value.

Thus, the probability that the pin will not fit inside the collar is 0.023.

8 0
3 years ago
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