Simplest way to do this:
number of books= 120
percentage represented by 120= 100%
increase current percent by 55%= 155%

: . 55% increase = original number of books * (155%)
= 120 * (155/100)
= 186

6 0

4 years ago

How do you simplify x-2/2-x?

Anestetic [448]

Answer:

-1

Step-by-step explanation:

Simplify the following:

x - 2/2 - x

Hint: | Reduce (-2)/2 to lowest terms. Start by finding the GCD of -2 and 2.

The gcd of -2 and 2 is 2, so (-2)/2 = (2 (-1))/(2×1) = 2/2×-1 = -1:

x + -1 - x

Hint: | Group like terms in x - 1 - x.

Grouping like terms, x - 1 - x = (x - x) - 1:

(x - x) - 1

Hint: | Look for the difference of two identical terms.

x - x = 0:

Answer: -1

7 0

4 years ago

The scheduled arrival time for a daily flight from Boston to New York is 9:35 am. Historical data show that the arrival time fol

Lady_Fox [76]

Answer:

The mean is 11.5 minutes and the standard deviation is of 6.64 minutes

Step-by-step explanation:

An uniform probability is a case of probability in which each outcome is equally as likely.

For this situation, we have a lower limit of the distribution that we call a and an upper limit that we call b.

The mean is:

$M = \frac{a+b}{2}$

The standard deviation is:

$S = \sqrt{\frac{(b-a)^{2}}{12}}$

Arrival time of 9:18 am and a late arrival time of 9:41 am.

9:41 is 23 minutes from 9:18. So the time is uniformily distributed between 0 and 23 minutes, so a = 0, b = 23.

Mean:

$M = \frac{a+b}{2} = \frac{0+23}{2} = 11.5$

Standard deviation:

$S = \sqrt{\frac{(b-a)^{2}}{12}} = \sqrt{\frac{(23 - 0)^{2}}{12}} = 6.64$

The mean is 11.5 minutes and the standard deviation is of 6.64 minutes

8 0

3 years ago

A factory builds a new warehouse that is approximately 1.28x10^5 square feet. Later, they add on 1.13x10^3 more square feet for

alexdok [17]

Answer:

The correct answer is 1.2913 x $10^{5}$ square feet.

Step-by-step explanation:

A factory builds a new warehouse that is approximately 1.28 x $10^{5}$ square feet = 128,000 square feet.

Later, they add on 1.13 x $10^{3}$ square feet = 1,130 square feet more for offices.

Thus the total size of the new building is given by 128000 + 1130 = 129130 square feet = 1.2913 x $10^{5}$ square feet.

Thus in scientific notation the total area of the factory is 1.2913 x $10^{5}$ square feet.

8 0

3 years ago