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BartSMP [9]
3 years ago
10

Please help first real answer will get brainliest

Mathematics
1 answer:
KATRIN_1 [288]3 years ago
8 0

Answer:

6

Step-by-step explanation:

a1(n-1) + D

d = 6

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A cylindrical metal pipe has a diameter of 8.4 millimeters
Phoenix [80]

Answer:

C. 271.44 mm^3

Step-by-step explanation:

We need to first find the volume of the pipe, then find the volume of the hole and then subtract the volume of the hole from the volume of the pipe.

The diameter of the pipe is 8.4 mm. This means its radius is:

8.4/2 = 4.2 mm

The height of the pipe is 10 mm

The volume of a cylinder is given as:

V = \pi r^2h

where r = radius

h - height

Therefore, the volume of the cylinder  without the hole is:

V = \pi * 4.2^2 * 10\\\\V = 554.18 mm^3

The diameter of the hole is 6 mm. Its radius is:

6/2 = 3 mm

The volume of the hole is:

V = \pi * 3^2 * 10\\\\V = 282.74 mm^3

The volume is:

554.18 - 282.74 = 271.44 mm^3

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3 years ago
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3 years ago
Under a microscope, ms. kapinski studies a culture with bacteria. as the number of hours progresses, ms. kapinski sees that the
velikii [3]

Answer:

Study 1 Answers:

1) 0.76 represents the multiplier of the bacteria, in this case it is decreasing by 24% because the formula for exponential decay is 1 - r.

2) 1290 represents the initial value, or before the study began.

Study 2 Answers:

1) 1180 is the initial value, or before the study began.

2) Study 1 started with more bacteria

3) Study 1 is experiencing exponential decay, while study 2 is experiencing exponential growth

Step-by-step explanation:

Exponential functions are in the form y=a(b)^x, where a is the initial value, b is the multiplier, and x represents inputs, such as hours after a bacteria study.

Any multiplier above 1.00 is experiencing exponential growth, meaning it grows gradually over time, and any multiplier below 1.00 is experiencing exponential decay, meaning it decreases in population over time.

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A pair of equations is shown below:
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Jayda is running around a track where 3 laps is 5km. She runs 6 laps in 20 min. What is her speed in min per km
zzz [600]

Answer:

2km/m

Step-by-step explanation:

6 laps = 10km

(because 3 x 2 = 6 and double 5km as well)

Distance divide time = speed

20 mins divided by 10km = 2km per minute

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3 years ago
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