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Romashka-Z-Leto [24]
3 years ago
14

I need help : D pleasee answer

Mathematics
2 answers:
Blizzard [7]3 years ago
4 0
There’s nothing showing up. I think you didn’t add a picture
natima [27]3 years ago
3 0

Answer:

The correct answer is the last one 80(5 + x)

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Bacteria vary somewhat in size, but a diameter of 1.5 μ m is not unusual.
Dmitrij [34]

Answer:

a) 1.8 × 10^-12 cm³ or 1.8 × 10^-12 cubic meters

b) 7.1 × 10^-6 mm² or 7.1 × 10^-6 square millimeters

Step-by-step explanation:

a) We are assuming that the shape of the bacteria is a sphere.

Hence, Volume of the Sphere(Bacteria) = 4/3 × π × r³

Diameter = 1.5 μm

Radius = Diameter/2 = 1.5μm/2

= 0.75μm

We are told that the volume should be in cubic centimeters

Converting 0.75μm to centimeters

1 μm = 1 × 10^-4 cm

0.75 μm =

Cross Multiply

= 0.75 μm × 1 × 10^-4 cm/ 1 μm

= 0.000075cm

Volume of the Sphere(Bacteria) = 4/3 × π × r³

= 4/3 × π × (0.000075)³

= 1.767145867 × 10^-12 cm³

Approximately as 2 significant figures = 1.8 × 10^-12 cm³

b) The formula for the Surface area of a Sphere = 4πr²

Diameter = 1.5 μm

Radius = Diameter/2 = 1.5μm/2

= 0.75μm

We are told that the surface area should be in square millimeters

Converting 0.75μm to millimeters

1 μm = 0.001 mm

0.75 μm =

Cross Multiply

= 0.75 μm ×0.001mm/ 1 μm

= 0.00075mm

Surface Area of a Sphere

= 4 × π × r²

= 4 × π × 0.00075²

= 7.06858 ×10^-6 mm²

Approximately to 2 significant figures

= 7.1 × 10^-6 mm²

6 0
3 years ago
What do I do I’m lost I need help?
ale4655 [162]

Answer:

27

Step-by-step explanation:

the sequence is 4 added to each number. 4 added to 23 is 27

8 0
2 years ago
Read 2 more answers
A total of 15000 is invested at an annual percentage rate of 12.5%. Find the accumulated amount after 3 years if it is compounde
aleksklad [387]

Answer:

24542.26 is the final balance

7 0
3 years ago
Read the question on the screenshot.
kondor19780726 [428]

Answer:

c: add x to each side

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Write a trinomial which is degree 2, where the coefficient of the highest degree term is 7.
Nady [450]

Answer:

7x^2 - 2x - 3.

Step-by-step explanation:

Starts with 7x^2  then a term in x then a constant.

4 0
2 years ago
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