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uysha [10]
3 years ago
7

Evaluate the following expression. (-3)-2

Mathematics
1 answer:
natta225 [31]3 years ago
4 0
-5 is your answer :))))


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The probability of waiting 4 minutes or longer for checkout at a particular supermarket counter is 0.1. On a given day, a man an
Vedmedyk [2.9K]

Answer:

Step-by-step explanation:

Hope this photo will find you well

Good day!

3 0
2 years ago
Use < >, or = to compare the following decimals.
Contact [7]

Answer:

0.32, 0.45, 0.76.

Step-by-step explanation:

so first you would use your < >,= signs and compare all of them until you have eliminated ALL but one (so 0.91<0.98 this is because 0.98 is close to 1 whole than 0.91) and you would continue this explanation for so on

4 0
2 years ago
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
2 years ago
What is 2.343 rounded to the nearest tenth
elena-s [515]
I'm pretty sure it's 2.3
3 0
2 years ago
Read 2 more answers
You and your friend each deposit $50 in separate savings accounts. Your account earns 2% simple annual interest. Your friend’s a
d1i1m1o1n [39]

Answer:

I am will take 20 years to get 20$

My friend will take 10 years to get 20$

Step-by-step explanation:

Let  \: the  \: no.  \: of \:  years : x \\  \\ for \: me \\  x \times (50 \times 2\%) = 20 \\ x \times 1 = 20 \\ x = 20 years\\ for \: my \: friend \\ x \times (50 \times 0.04) = 20 \\ 2x = 20 \\ x = 10 \: years

I hope this is be good for you and I want this money

7 0
2 years ago
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