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icang [17]
2 years ago
11

Simplify: (2.1 x 10 3) x (2 x 102)

Mathematics
2 answers:
notka56 [123]2 years ago
4 0

Answer:

25/45

Step-by-step explanation:

Keith_Richards [23]2 years ago
3 0

Answer:

Step-by-step explanation:

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Which pair of lines is parallel? A. y=-2x+4 and y=2x-1 B. y=1/2x-1 and y=1/2x+10 C. y=x+3 and y=-2x+3 D. y=3x+5 and y=1/3+2
Lana71 [14]
Parallel lines have the same slope.

The answer is choice B.

Why?

Both equations share the same slope which is 1/2.

See it?
4 0
3 years ago
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The mean temperature for the first 7 days in January was 6 °C.
balandron [24]

Answer:

6.875° C

the mean of a set of data is calculated using

mean =

For the first 7 days the mean is 8 and the count = 7

8 =  ( cross- multiply )

sum = 8 × 7 = 56

Add on the temperature on the 8 th day to the sum and divide by 8 for mean

sum = 56 - 1 = 55

mean =  = 6.875° C

2nd question

Height of marble from the ground

An independent variable is the variable in an experiment that you change to see if it has an effect on the dependent variable. In this case, Jack wanted to see whether the position of the marble on the ramp (which would be the height) has an effect on the kinetic and potential energy of the marble, then the height would be the independent because it is what is being changed.

The dependent would be the kinetic and potential energy and the constant would be the type of marble.

3 0
3 years ago
1.7 meters to millimeters_____m =
Aloiza [94]
1700m is the correct answer
7 0
3 years ago
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Find the distance between 6.2 and<br> -4.3 on a number line.
Nitella [24]

Answer:

The two given numbers are 10.5 units apart.

Step-by-step explanation:

Subtract the smaller from the larger.  The larger number here is 6.2. Then we have

6.2 - (-4.3) = 6.2 + 4.3 = 10.5

The two given numbers are 10.5 units apart.

8 0
3 years ago
At noon, ship A is 50 km west of ship B. Ship A is sailing south at 10 km/h and ship B is sailing north at 20 km/h. How fast is
Lena [83]
So  hmmm check the picture below

so, we're looking for dr/dt then at 4:00pm or 4 hours later

now, keep in mind that, the distance "x", is not changing, is constant whilst "y" and "r" are moving, that simply means when taking the derivative, that goes to 0

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6 0
3 years ago
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