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2 years ago

Complete the number sentence:

2 answers:

7 0

D divide by 1000… you are shifting the decimal 3 places (there are 3 zeros in 1000) you are dividing because the number is getting smaller.

Sergio039 [100]2 years ago

5 0

D. divide 1000
this moves the decimal three places to the left

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There is a bag filled with 4 blue and 5 red marbles.

gavmur [86]

1) first pick red 5/9 blue 4/9

2) second pick when red has been picked red now becomes 4/8, blue stays 4/8

2) Second pick when blue has been picked blue now becomes 3/8, red stays 5/8

Mind you, you only need both different colours so:

first pick red 5/9 x sec pick blue 4/8 = 20/72

and first pick blue 4/9 x sec pick red 5/8 = 20/72

add both up 20/72 + 20/72 = 40/72 = 5/9

6 0

2 years ago

Question is below (wasn't sure about the answer)

Paha777 [63]

Answer: Choice A)

$H = \frac{SA}{2(L+W)} - \frac{LW}{L+W}\\\\$

=================================================

Work Shown:

$SA = 2(LW + LH + HW)\\\\2(LW + LH + HW) = SA\\\\LW + LH + HW = \frac{SA}{2}\\\\LH + HW = \frac{SA}{2} - LW\\\\H(L + W) = \frac{SA}{2} - LW\\\\H = \frac{\frac{SA}{2} - LW}{(L + W)}\\\\H = \frac{SA}{2(L+W)} - \frac{LW}{L+W}\\\\$

This is not the only way to solve for H.

3 0

2 years ago

You park in a parking garage 3 floors below ground level. Then you get in an elevator and go up 9 floors. How many floors are yo

SpyIntel [72]

Answer: (B) 6 floors

Step-by-step explanation: Use the equation -3 + 9 to get the amount of floors above ground level.

-3 + 9 = 6

6 floors.

3 0

3 years ago

Read 2 more answers

What is the approximate angle of elevation when Brendon looks up at the tower?

Semmy [17]

Answer:

20 degrees

Step-by-step explanation:

I don't know why the 30 degrees was given at point A because you don't need that.

The equation is;

Sinx= Opposite/Hypotneuse

x = Sin inverse (50/146)

= 20.02

Rounded to 20 degrees

6 0

2 years ago

b. Find and interpret the standard deviation of the number of floors in this data set. Select the correct choice below and fill

Nat2105 [25]

Answer:

Option B. The standard deviation of the number of floors per city is nothing.

Step-by-step explanation:

The standard deviation of a data set is the statistic that measures the deviance or dispersion of the data from the relative mean. In other words, it is is a measure of how spread the numbers are. The standard deviation is given by the following formula:

$\sigma = \sqrt{\frac{1}{N}(x-\mu) ^{2} }$

In this case, it is the deviation of the number of floors in the building in the city.

7 0

2 years ago