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3 years ago

I would like to know How to calculate ?

Mathematics

1 answer:

BabaBlast [244]3 years ago

4 0

First you must multiply the denominators to make them the same number; 4 times 5=20 so your new denominator is 20 then multiply the three times four= 12 then the one times five=5 then you add, 12/20+5/20= 17/20. And that answer is also in simplest form.

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The distance from Earth to the moon is 384,400 kilometers. What is this distance expressed in scientific notation?

r-ruslan [8.4K]

The answe may be C or D

3 0

4 years ago

Read 2 more answers

I also need help rq for questions number 3

HACTEHA [7]

Answer:

12 because 12 to the power of two will be 12 x 12 = 144, and 35 x 35 = 1225 which is b and 37 x 37 = 1369 which is c and is the answer so.. 144 + 1225 = 1369. SO 12 would fit!

6 0

3 years ago

The ages of 11 students enrolled in an on-line macroeconomics course are given in the following steam-and-leaf display:

blsea [12.9K]

Answer:

The standard deviation of the age distribution is 6.2899 years.

Step-by-step explanation:

The formula to compute the standard deviation is:

$SD=\sqrt{\frac{1}{n}\sum\limits^{n}_{i=1}{(x_{i}-\bar x)^{2}}}$

The data provided is:

X = {19, 19, 21, 25, 25, 28, 29, 30, 31, 32, 40}

Compute the mean of the data as follows:

$\bar x=\frac{1}{n}\sum\limits^{n}_{i=1}{x_{i}}$

$=\frac{1}{11}\times [19+19+21+...+40]\\\\=\frac{299}{11}\\\\=27.182$

Compute the standard deviation as follows:

$SD=\sqrt{\frac{1}{n}\sum\limits^{n}_{i=1}{(x_{i}-\bar x)^{2}}}$

$=\sqrt{\frac{1}{11-1}\times [(19-27.182)^{2}+(19-27.182)^{2}+...+(40-27.182)^{2}]}}\\\\=\sqrt{\frac{395.6364}{10}}\\\\=6.28996\\\\\approx 6.2899$

Thus, the standard deviation of the age distribution is 6.2899 years.

7 0

3 years ago

Michael says that 5(1/5^3) = 5(5^3) is his answer correct explain.

kow [346]

Answer: His answer is wrong

Explanation:

5(1/5^3) = 5(1^3/5^3) = 5(1/125)
5(5^3) = 5(125)

Let’s compare:

5(1/125) < 5(125)

Because 1/125 is smaller 125
Thus, it is not equal.

8 0

3 years ago

A butcher purchases 50 chicks at the rate of Ts.60 per chick.10 of them died and he sold remaining chicks at the rate of Rs.80 p

Romashka-Z-Leto [24]

Answer: 6.25%

Step-by-step explanation:

50 chicks were purchased at Rs. 60. The total cost of the chicks is:

= 50 * 60

= Rs. 3,000

10 of the chicks died which means the farmer was left with 40 chicks.

These chicks are sold at Rs. 80. Total revenue from the sales are:

= 40 chicks * 80

= Rs. 3,200

The profit is:

= 3,200 - 3,000

= Rs. 200

The percentage is:

= Profit / Revenue

= 200 / 3,200

= 6.25%

3 0

3 years ago