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4 years ago

Round 0.002353 to two significant figures.

1 answer:

4 0

The given number above, 0.002353, may be rounded to only two significant figures by adding 1 to the 3 which is in the fourth place of the decimal position. This becomes, 0.0024. Addition of 1 was done because the number that follows 3 in the original number is 5.

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If I add the square of a number to the number itself, I get 30. What could the number be?

Wittaler [7]

Answer:

I know you could easily solve this just looking at it.

But if you want the algebraic solution:

x + x^2 = 30

x^2 + x -30 = 0

a = 1

b = 1

c = -30

Using the quadratic formula:

x = [ -b +- sqr root (b^2 - 4ac) ] / 2a

x = [-1 +- sqr root (1 - 4 * 1 -30) ] / 2*1

x = [-1 +- sqr root (1 + 120) ] / 2

x = -1 +- sqr root (121) / 2

x1 = (-1 + 11) / 2 = 10 / 2 = 5

x2 = (-1 -11) / 2 = -12 / 2 = -6

Answers are 5 and -6

5 + 5^2 = 30

-6 + (-6)^2 = 30

-6 +36 = 30

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

A hospital has been vaccinating people in two different locations. At the start of the month, location A has reported it has vac

Flauer [41]

Since Location A has vaccinated 10 thousand people at the start of the month, then write 10 on the first row of the first colum.

Since they can apply vaccines at a rate of 20 thousand people per week, add 20 thousand to the value on each row (in thousand) to find the value of the next. Then, the column A will contain the following data:

0: 10

1: 30

2: 50

3: 70

4: 90

5: 110

6: 130

Similarly, place 60 thousand on the first row on the column B and ad 5 thousand each time:

0: 60

1: 65

2: 70

3: 75

4: 80

5: 85

6: 90

Don't forget to show the calculations on the answer. For column A:

10+20=30

30+20=50

... and so on.

For column B, start with 60 and add 5 each time.

8 0

1 year ago

The coordinates of parallelogram PVWZ are P(0, 0), V(a, b), and Z(c, 0). Find the coordinates of W without using any new variabl

cupoosta [38]

Answer:

Co-ordinates of W must be (c+a,b).

Step-by-step explanation:

We are given that,

PVWZ is a parallelogram with vertices P(0,0), V(a,b) and Z(c,0).

Since, PVWZ is parallelogram.

The possible line segments are PV, VW, WZ and ZP.

Also, as the opposite sides must be parallel for the parallelogram, the co-ordinates will move accordingly.

So, we see from the figure that,

Co-ordinates of W must be (c+a,b).

Step-by-step explanation:

3 0

4 years ago

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Solve using elimination -2x+4y=-16 -2x-y=19

sergejj [24]

Elimination is getting rid of one of the variables the answer is (-6,-7)

3 0

3 years ago

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By using long division, divide 4x3 + x2 – 36x - 9 by 4x + 1.

AleksAgata [21]

Answer:

$\frac{4x^{3}+x^{2}-36x-9}{4x+1}=\frac{x^{2}(4x+1)-9(4x+1)}{4x+1}\\ \\=\frac{(4x+1)(x^{2}-9)}{4x+1}\\ \\=x^{2}-9\\ \\=(x-3)(x+3)$

8 0

4 years ago