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ollegr [7]
3 years ago
6

If two lines are perpendicular to each other their slopes are

Mathematics
1 answer:
Anarel [89]3 years ago
3 0
Positive slope and negative slope so one line is negative and the other is positive
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The diameter of the average cell in the human body is 1 x 10-5 meters. The diameter of a grain of sand is about 2 x 10-4 meters.
MariettaO [177]
PART A:

Scientific notation is given by A×10ⁿ where A is any number in a unit and 'n' is an integer.

0.000025 = 2.5×10⁻⁵

PART B:

Diameter of grain of sand ÷ Diameter of human body average cell
(2×10⁻⁴) ÷ (1×10⁻⁵) 
(2÷1) × (10⁻⁴÷10⁻⁵)
2 × (10⁻⁴ ⁻ ⁻⁵) = 2 × 10⁽⁻⁴⁺⁵⁾ = 2 × 10¹ = 20 times bigger

PART C:

The diameter of human body's average cell in nanometer
1 × 10⁻⁵ metre = 1 × 10⁻⁵ × 10⁹ = 1 × 10⁽⁻⁵⁺⁹⁾ = 1 × 10⁴ nanometer

PART D:

Smallest bacteria = 300 nanometer
300 nm = 300 ÷ 10⁹ = (3 × 10²) ÷ 10⁹ = 3 × (10²⁻⁹) = 3 × 10⁻⁷ meter

PART E:

Laws of exponents that are applied in scientific notation is 

xᵇ × xᵃ = x⁽ᵇ⁺ᵃ⁾
xᵇ ÷ xᵃ = x⁽ᵇ⁻ᵃ⁾

7 0
3 years ago
ASAP
Lerok [7]

Answer:$90,000

Step-by-step explanation:

3,000*30=90,000

4 0
3 years ago
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Amanda has 2,00,234 dollars. She needs 4,00,578 dollars. Her friend Alice gives her 207,78 and then Amanda gives her 200 back. H
lutik1710 [3]

Answer:

sorry i dont know

Step-by-step explanation:

7 0
3 years ago
Rearrange y= 2(x-a)/x to make x the subject
Sidana [21]

Answer:

y = 2(x-a)/x

xy = 2x-2a

xy-2x = -2a

x(y-2) = -2a

x = (-2a)/(y-2)

3 0
3 years ago
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In a standard deck of 52 cards, what is the probability of drawing one card and getting a face card or a heart?
serious [3.7K]

Answer: I hope this helps :)

Step-by-step explanation:

All in all, this leaves us with #(Heart or Face card) = 13+12–3=22 cards.

So your probability would be p(Heart or Face card)= 22/52  or  11/26  or 42,3%

(but they are all the same)

4 0
3 years ago
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