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xeze [42]
3 years ago
8

Whats (4.2×10^6)+(2.25 × 10^5) in scientific form

Mathematics
1 answer:
lys-0071 [83]3 years ago
8 0
We are going to rewrite both numbers:
 (4.2 × 10 ^ 6) = 4200000
 (2.25 × 10 ^ 5) = 225000
 Adding we have:
 4200000 + 225000 = 4425000
 Rewriting in exponential notation we have:
 4425000 = 4,425 * 10 ^ 6
 Answer:
 
(4.2 × 10 ^ 6) + (2.25 × 10 ^ 5) is equal to:
 
4,425 * 10 ^ 6
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Help me im absotootley verytootley megatootely stoopid.
Whitepunk [10]

Answer:

The graphs are posted.

Step-by-step explanation:

the method to solve such inequalities is assume the line and then draw the line then search for the inequality

The y < 0.5x-3

First plot  the line y=0.5x-3

Now all the values of y which are below the line satisfies the inequality.

similarly for the second question x+y ≥ 5.

Now assume the line x+y=5

All the values of (x , y) above the line satisfies the equation including the points on the line .

3 0
3 years ago
The volume (in cubic inches) of a shipping box is modeled by V =2x³ -19x² +39x, where x is the length (in inches). Determine the
yawa3891 [41]

Answer:

The values of x for which the model is 0 ≤ x ≤ 3

Step-by-step explanation:

The given function for the volume of the shipping box is given as follows;

V = 2·x³ - 19·x² + 39·x

The function will make sense when V ≥ 0, which is given as follows

When V = 0, x = 0

Which gives;

0 = 2·x³ - 19·x² + 39·x

0 = 2·x² - 19·x + 39

0 = x² - 9.5·x + 19.5

From an hint obtained by plotting the function, we have;

0 = (x - 3)·(x - 6.5)

We check for the local maximum as follows;

dV/dx = d(2·x³ - 19·x² + 39·x)/dx = 0

6·x² - 38·x + 39 = 0

x² - 19/3·x + 6.5 = 0

x = (19/3 ±√((19/3)² - 4 × 1 × 6.5))/2

∴ x = 1.288, or 5.045

At x = 1.288, we have;

V = 2·1.288³ - 19·1.288² + 39·1.288 ≈ 22.99

V ≈ 22.99 in.³

When x = 5.045, we have;

V = 2·5.045³ - 19·5.045² + 39·5.045≈ -30.023

Therefore;

V > 0 for 0 < x < 3 and V < 0 for 3 < x < 6.5

The values of x for which the model makes sense and V ≥ 0 is 0 ≤ x ≤ 3.

8 0
3 years ago
A survey of 200 families showed that
KengaRu [80]

Answer:

15 is the answer , the total people who has dogs , cats , parakeets and none is equals to <u>185</u> then from 200 you minus 185 which is 15 so 15 people had parakeets only

4 0
3 years ago
Find the domain and range of the following graph<br> Write your answer as an interval.
HACTEHA [7]

Answer:

Domain: [1, infinity)

Range: All real numbers or (- infinity, + infinity)

Step-by-step explanation:

Hope this helps

8 0
1 year ago
Which binomial is a factor of 12x^2 - x - 20
stellarik [79]

Answer:

12x² - x - 20 = (4x+5)(3x−4)

3 0
3 years ago
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