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2 years ago

7

Write each number in scientific notation 1 27.5

2 answers:

babymother [125]2 years ago

8 0

1 = 1 x 10 exponent 0
27.5 = 2.75 x 10 exponent 1

inysia [295]2 years ago

4 0

The positive exponent of 10 is the number of places you need to move the decimal point left to get the number in the form d.f...f × 10ⁿ where d is some non-zero digit, and the digits f are those necessary to express the full precision of the number. Moving the decimal point to the right will produce negative values of n.

1 = 1 × 10⁰

27.5 = 2.75 × 10¹

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An initial population if 1000 starfish double each year for 4 years. What is the population after 4 years?

Zolol [24]

Answer:

16,000 starfish

Step-by-step explanation:

year 0: 1000

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2 years ago

Using the order of operations, what should be done first to evaluate (-2)^3 + 4 / (-15 + 9)(3) - 4

kogti [31]

Answer:

A. add -15 and 9

Step-by-step explanation:

We follow the PEMDAS rule as the order of operations to evaluate expressions.

P-Parenthesis

E-Exponents

M-Multiplication

D-Division

A-Addition

S-Subtraction

Given expression : $(-2)^3+4\div(-15+9)(3)-4$

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7 0

3 years ago

Read 2 more answers

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Salsk061 [2.6K]

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7 0

2 years ago

Find the value of x² - x+1 when x=√3 -1, in the form a+b√3 where a and b are integers

lidiya [134]

Answer:

$6-3\sqrt{3}$

If you compare this to $a+b\sqrt{3}$ , then $a=6$ and $b=-3$ .

Step-by-step explanation:

We are given $x=\sqrt{3}-1$ and we are asked to find the value of $x^2-x+1$ .

So we will need to find $x^2$ .

$x=\sqrt{3}-1$

Square both sides:

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Expand using identity: $(x-a)^2=x^2-2ax+a^2$ .

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$x^2=3-2\sqrt{3}+1$

$x^2=4-2\sqrt{3}$

Let's go back to the full $x^2-x+1$ .

$x^2-x+1$

$(4-2\sqrt{3})-(\sqrt{3}-1)+1$

$4-2\sqrt{3}-\sqrt{3}+1+1$

$6-3\sqrt{3}$

If you compare this to $a+b\sqrt{3}$ , then $a=6$ and $b=-3$ .

5 0

3 years ago

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beks73 [17]

Answer:

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Step-by-step explanation:

y = 3x2+6

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y = 12

5 0

3 years ago